1. Introduction
The pet industry in the United States is remarkable, with 86.9 million US households owning at least one pet and 65.1 million of those households owning at least one dog [
1]. United States households are two times more likely to own a pet than they are to have a child under 18 years of age [
2]. Pet ownership has a significant economic impact; USD 136.8 billion was spent in 2022, of which USD 58.1 billion was spent on food and treats [
1]. The pet industry has seen immense growth over the last 80 years; since 1960, the industry’s average growth rate per year has been 7.5%. This growth rate is 80% faster than total income growth and twice as fast as total spending. Estimating the exact number of dog treat sales is difficult; however, the American Pet Products Association 2021 survey estimates that USD 5.59 billion was spent on dog treats alone, representing at least 10% of pet food product sales. That is a sizable percentage, considering that USD 58.1 billion in food product sales was for all pet food products, including fish, birds, rodents, etc. [
1]. Dog treats clearly own a massive portion of the market.
The amount of money spent in the pet industry is thought to “be less than capacity”, meaning owners are willing to spend more money if presented with products that meet their needs and expectations. Current market research is focused on ways to fill that gap by focusing in on consumer preferences [
3]. Much effort has gone into investigating pet food product palatability; however, most of this research is proprietary and not publicly available [
4]. Additionally, much research has been conducted on American consumers [
5,
6,
7], but very little has been carried out on consumer preference regarding pet food products. There is heavy focus on the pets’ preference for a food product, but that is only one part of the big picture. Pets do not buy their products; rather, the pet owner, must buy the product and then offer it to the pet. If the product is not purchased, the palatability of the product is not determined. The pet food industry is consistently growing, with plenty of space in the market for new companies and products to fulfill consumer needs, especially those within niche markets [
8]. There is a known, yet poorly studied, divisions amongst dog owners with regards to their intended purpose behind dog-ownership and therefore different priorities when it comes to selecting dog treats. Consumers vary from casual pet owners and those who actively compete to those who own working dogs, such as for search and rescue or for therapy. Further investigation is warranted to understand how individuals perceive a novel health bar for active/working/sports dogs. This study aims to better determine the purchasing behavior and motivation of individuals who feed their dogs treats.
2. Materials and Methods
2.1. Samples
Three different commercially available dog treats were selected and purchased from a local pet retailer in a rurally located city in Texas. All products were verified to be un-opened and in-date. Treats were chosen based on not having animal protein as the first ingredient and being crunchy in texture so as not to be distinctly different from the novel product. In addition, all products had similar marketing claims, such as healthy, all natural, etc. The novel product was purchased directly from the manufacturer. Three brands were represented, including the novel product. Two of the commercially available products were from the same brand but had different formulations. Samples varied in size, shape, and color, apart from two, which were the same size and shape but had slightly differing colors. Throughout this text, the products will be referred to by their primary flavor acronym.
Table 1 lists their ingredient contents.
2.2. Participants
Surveying was conducted with Institutional Review Board approval from a rurally located university in Texas over a three-day period. Seventy consumers were recruited via word of mouth, flyers posted around the university campus, and mass e-mail to current students at the university. Participants were required to be at least 18 years of age and own at least one dog. Other than the two listed criteria, respondents were not filtered in any way. Participation was incentivized using a raffle entry to win a gift basket valued at USD 50. Participants read and acknowledged their consent before proceeding with the survey. Participation was voluntary and respondents could exit the survey without completing it or choose not to answer questions.
2.3. Survey Questionnaire
The survey was broken into four sections of questions: (1) dog demographics; (2) treat attributes; (3) general marketing; and 4) marketing and price of the novel product (
Appendix A). The first portion of the survey consisted of six dog demographic questions: number of dogs owned [
9,
10], dog age range, breed group, sports and recreational activities, and owner-reported dog energy level; all response options were multiple-choice. The second portion of the survey consisted of 7 questions per treat, for a total of 28 questions. Questions in this portion asked respondents to rate aroma, texture, color, size, shape, and overall appearance on a five-point hedonic scale, where the answer options were strongly dislike, dislike, neutral, like, and strongly like [
11]. The third portion of the survey had 8 questions per product and totaled 32 questions. The first five questions per product were five-point hedonic scale questions. Hedonic scale questions were formatted the same as in the second portion of the survey, except the attributes asked about differed. Attributes were overall appearance, package type (resealable/size), package statements, ingredients, and treat style (loose/breakable). Respondents could select multiple statements that they felt affected their purchase intent in either a positive or negative way, including packaging type, packaging appearance, packaging statements, treat style, product familiarity, and ingredients. The last portion of the survey was specific to the novel product and asked if the consumer would be interested in purchasing multiple packages at a time, and if so, how many, as well as correlating price points with those purchase intents.
2.4. Consumer Study
Treat samples were presented monadically unpackaged to the respondents on paper plates for the second part of the survey. Approximately 4 treats per sample product, an average amount of treats suggested to be fed in a day across all products, were labeled “sample #1”–“sample #4”. All four sample products were served to each respondent during this portion of the survey. Respondents were asked to rate aroma, texture, color, size, shape, and overall treat appearance on a five-point hedonic scale. Samples were covered with paper cups between participants and while not being observed.. Sample treat products were replaced approximately after every 10 respondents to maintain freshness of aroma and texture as observed when the product was initially removed from the packaging by trained survey conductors. Survey conductors were trained to only facilitate the survey and not to interact with the respondent outside of assisting with technical issues and guiding them to the next step of this study. Additionally, respondents were instructed to look at the packaging of each sample product one at a time during the third portion of the survey. While observing the sample product within its packaging, the respondents were asked to answer questions related to the overall appearance of the package, package type (resealability/size), package statements, ingredients, and treat style (loose/breakable) before moving to the next sample product. The survey was completed using Qualtrics®XM (Qualtrics, Provo, UT, USA) on university-supplied iPads. Completion time averaged 34.3 min per respondent.
2.5. Data Analyses
G*Power 3.1 software was used to compute a priori power analysis at 0.95 power (probability of finding significance), alpha criterion level of 0.05, and an expected effect size of 0.25 for all tests [
12,
13,
14]. Data were filtered by each survey section for completion. Section one was completed by all 70 participants, section two was completed by 66 participants, section three was completed by 45 participants, and section four was completed by 70 participants. To ensure the accuracy of statistical analyses, respondents were removed from each section if they did not complete that section. Microsoft Excel was used to process the data from words to associated numerical values for use in JASP (JASP Team, 2022 and Microsoft Corporation, Redmond, Washington2018). All statistical analyses were run in JASP.
Repeated-measures analysis of variance (ANOVA) was performed to compare the likeness means of the six treat attributes (dependent variables)—aroma, size, shape, color, overall appearance, and texture—as a function of brand (explanatory variable) using a 95% level of significance with a Holm corrected p-value. Levene’s test was conducted to verify the assumption of homogeneity of variances. Post hoc tests were performed only when the initial test suggested significant effect. A repeated-measures ANOVA was performed to compare the likeness means of the five marketing attributes (dependent variables)—overall appearance, package type (resealability/size), package statements, ingredients, and treat style (loose/breakable)—as a function of brand (explanatory variable) using a 95% level of significance with a Holm corrected p-value. Levene’s test was conducted to verify the assumption of homogeneity of variances. Post hoc tests were performed only when the initial test suggested a significant effect.
A two-way ANOVA was performed to compare the means of how much the respondents thought their dog would like the treat (dog likeness) (dependent variable) as a function of brand (explanatory variable) using a 95% level of significance with a Holm corrected p-value. Post hoc tests were performed only when the initial test suggested a significant effect. A two-way ANOVA was performed to compare the means of how much the respondents were willing to pay for each product (dependent variable) as a function of brand (explanatory variable) using a 95% level of significance with a Holm corrected p-value. Levene’s test was conducted to verify the assumption of homogeneity of variances. Post hoc tests were performed only when the initial test suggested a significant effect. A two-way ANOVA was performed to compare the means of how likely the respondents were to purchase each product (purchase intent) (dependent variable) as a function of brand (explanatory variable) using a 95% level of significance with a Holm corrected p-value. Post hoc tests were performed only when the initial test suggested a significant effect.
The following correlation analyses were also conducted using a 95% level of significance: treat attributes, brand, dog likeness, marketing attributes, package statements, treat style, and purchase intent. If significance was detected in any of the correlation analyses, a general linear model (GLM) was run on those variables to determine the exact relationship.
Dog demographic data and novel product-specific data are reported descriptively without statistical analysis.
4. Discussion
Despite dog treats representing a sector of the pet food industry with a steady year-on-year growing trend, little attention has been dedicated to investigating consumer interest in a novel product for a unique segment of the dog market. The results of this research showed that consumer preferences are impacted by a variety of factors when purchasing dog treats. In this study, an array of treat attributes and marketing factors were significantly different across brands. Overall, the novel product (CK) studied tended to be rated the poorest by respondents. This could have been impacted by the novel product being visually different from other samples surveyed, despite the fact that the products were all quite similar in formulation (primarily plant-based) and consistency (crunchy, dry, and baked). The novel product, CK, was packaged individually in a resealable pouch as small bars (1.25 ounce) that were scored to be broken into smaller square pieces (0.10 ounce). All other products were loose treats that were packaged in bags; products CSP and PBB were not resealable, whereas the BRY product’s package was resealable. The CSP and PBB treats were large (compared to other products in this study), round treats that came in a 14-ounce package, and the BRY treats were small, rounded triangles with a small hole in the center that came in a 16-ounce package. A repeat study with more variation in treat shapes, styles, and packaging should be considered to identify specifically which attribute the respondents liked. The CK and BRY treats would generally fall into a “training treat” category, in that they are small enough to be used frequently during training sessions. However, the CK treat is not marketed as a training treat and is instead marketed as aK-9 health bar. In contrast, the CSP and PBB treats are larger and would generally fall into a “snack” category, in that they are most likely to be given infrequently for enrichment. Italian researchers reported that 42% of owners gave treats as training rewards and 5% gave treats for purported health benefits, with an estimated 53% giving for dog enjoyment or no defined reason [
15]. Given that the novel product was the only marketed health K-9 bar in the study, future studies should include other products marketed with health benefits as the primary selling point.
The scope of this study should be understood within the demographics of the respondents. Respondents were primarily university students, and thus, these results are likely not representative of all US consumers but rather Texas university students. The university where the survey was held is in a rural county in Texas. Though participant demographics were not collected, it is likely that there is a variety of rural and urban responses represented given the university location and student population demographics. Therefore, our results may not be generalizable to the overall dog ownership population in the US. Dog ownership differs significantly by gender, income, age, race, and ethnicity [
16]. The American Pet Products Association reported individuals aged 18–25 own 16% of all pets, with 86% of that being dogs, while Millennials (ages 26–43) make up the largest percentage (33%), with 66% having dogs [
17]. Furthermore, Colorado, Virginia, Georgia, Alaska, and Nevada rank higher than Texas for the most devoted dog owners [
17]. Future research should aim to include a more diverse sample population to survey to gain insight into consumer-driven choices related to dog ownership.
Only 18.6% of respondents said they participated in work/sport activities with their dog(s); since the novel product is primarily marketed as a health bar for active dogs, this skewed demographic could further explain its inferior performance in this survey. However, on the other hand, only one participant said their dog was inactive; 18.6% said their dog was extremely active, and 34.3% said their dog was very active. This may imply that individual dog activity levels do not necessarily correspond with what dog owners look for in treat marketing statements. Additional research should target market segmentation in the dog industry and should include respondents attending sport/work/show events in addition to the general pet population [
18].
Treat attribute likeness scores were different across products for aroma, texture, and overall appearance. No difference was found for color, size, and shape, which aligns with Morelli and others’ findings in 2019. However, other previous studies found that color, size, and shape were significant factors in how much consumers liked different dry dog foods, and aroma was not significant unless the odor was found to be too strong [
9,
11]. While both prior studies were looking at dry dog food specifically, both results showed that consumers did not prefer dark kibbles or those with high-dimensional contrast shapes [
9,
11]. This would align with our results, as the overall treat attribute score (average of all treat attributes surveyed) was lowest for the novel product. The novel product was very dark in color and square in shape; however, the likeness scores for the overall appearance of the treats were not different between the BRY and CK products, though the CK product was scored significantly lower than the CSP and PBB products. All other products had comparable overall treat attribute scores and were light–medium in color, with lower-dimensional-contrast shapes. Additionally, our findings may contrast with the aforementioned studies as the BRY treat had a very strong berry odor that received the highest likeness score for aroma, which was significantly different from the CSP and CK treat aroma scores; this could be due to a berry aroma being perceived as pleasant by humans versus dry dog food odors.
All treat attributes were correlated with owner-predicted dog likeness, suggesting that the overall treat attribute score of a product is a good predictor of how much an owner anticipates their dog will like the product. Since consumers are generally unable to gauge treat attributes such as aroma and texture when deciding to make a purchase, this information may be more pertinent to repeat buyer behavior. General linear models showed that all treat attributes significantly impacted owner-predicted dog likeness scores, with overall appearance having the greatest impact, followed secondarily by aroma. An interesting finding in the GLMs was that shape negatively affected owner-predicted dog likeness scores. Since respondents were not asked to define if they preferred small or large treats, and there was no difference in size likeness scores across brands, we cannot accurately interpret this model for our study.
With overall treat appearance being the best predictor of dog likeness scores, correlation analysis was used to identify what treat attributes most affect overall appearance scores. All treat attributes were found to affect overall appearance. More research would be needed to further define which colors, shapes, sizes, aromas, and textures are preferred by consumers. A lexicon for the sensory properties of dry dog food, which could be used to further this area of research, was developed by Donfrenseco et al. in 2012 [
10].
Previous research has noted that packaging and brand are the primary driving purchasing factors when dog owners buy products [
3,
4,
9,
15]. Like Morelli’s 2019 [
15] study, no difference in brand preference was reported in the current study; this significantly contrasts with other previous findings, such as those by Boya, Donfrancesco, and Koppel [
3,
4,
9]. The lack of significant difference across brands for all other marketing attributes heavily contrasts with current industry notions that package statements and ingredients are of great importance to the consumer’s purchase intent. There was perhaps not enough variation presented to respondents regarding packaging statements and ingredients as all products were similar in their statements and ingredient profiles. This is also apparent in our results from the questions that asked respondents about their perceptions of marketing attributes as answers were highly similar across brands. Future studies should include more variation in products with various packaging statements to ascertain their impact.
Given that the average of all marketing attributes was different between the CK and BRY products, further analysis was used to predict which attributes may have the most impact on consumer preference. Overall package appearance was correlated with all other marketing attributes surveyed but was not correlated with product. Additionally, overall packaging appearance likeness scores were correlated with how much the respondent said they would be willing to pay for a product. A general linear model showed that dollar value increased by USD 1.31 for every one unit increase in likeness score. Theoretically, this means that a product with a “Strongly dislike” response would be worth USD 5.24 less than a product with a “Strongly like” response to that consumer. Depending on the product’s profit margins, this could have a very significant impact on the manufacturer.
Dollar value was also correlated with all other marketing attributes, but not product. While GLMs showed significant linear relationships between these attributes and dollar value, their monetary impact was less than the overall appearance attribute. Dollar value increased by USD 1.06 per one unit increase in package type and by USD 1.08 per one unit increase in package statements. Like the finding with treat attribute size, one marketing attribute had a negative linear relationship with dollar value. As ingredient likeness scores increased, dollar value decreased by USD 0.02. Though this finding is statistically significant, the difference in dollar value is small and in contrast with current consumer research [
3]. Further exploration of this finding with a larger and more diverse sample is needed.
The amount respondents were willing to pay for a product was lowest for the novel product and comparable for all other products. Given that the CK product did the poorest in all areas of this study, it is reasonable to think that consumers would be less willing to pay for said product. The average dollar value of the other three products was USD 8.71, where the mean for the CK brand was USD 5.98. However, this begs the question of whether respondents were basing their answers on how much product they thought they were purchasing. The CK product was presented as two individual bars in their packaging for a total of 2.5 ounce presented to the respondent. All other products were of much larger quantity; when price per ounce is calculated, respondents were willing to pay the most for the CK product, and double for what it currently retails. At the end of the survey respondents had the option to answer questions specific to the CK product to give feedback to the manufacturer regarding price points. Forty-six respondents participated in this section; in this portion, the average amount respondents were willing to pay per bar in a multi-bar package was USD 2.28. This value is still over triple the dollar value per ounce respondents were willing to pay for the other three products. Further investigation of this disparity is needed to clarify the relationship between dollar value, treat attributes, and marketing attributes, since the CK product did the poorest in all attributes yet appears to be worth the most to consumers on a per ounce basis.
Purchase intent was different across brands and was lowest for the novel product but comparable to the CSP product. Purchase intent was highest for the BRY product, which was comparable to the PBB product. Given the lower likeness scores of all attributes for the CK product, its lower purchase intent is not surprising. The BRY product was scored highest in aroma but was comparable to PBB; it also scored the highest for texture but was not different from CSP or PBB. Overall treat appearance for BRY was not different from any other products and the average of all treat attributes, while highest for BRY, was only significantly different from CK. Package type for BRY was the most preferred over all the other packages. The overall package appearance and average of all marketing attributes for BRY were higher than CK but were comparable to the other two products. Given our results, the only attributes that statistically set BRY apart from the other products were package type and aroma. This may explain why PBB also had high purchase intent as it scored as well as BRY for the aroma attribute and was comparable in other attributes. Given this information, it appears that treat attributes, while they are correlated with owner-predicted dog likeness and thus may have had some impact not captured in this study, do not directly impact consumer purchase intent in the capacity that marketing attributes such as package type do. Previous works [
3,
4,
9] confirm that packaging is the primary driver for consumer purchase decisions and that appears to be supported in this study as well. In addition to the aforementioned, when consumers were asked what influenced their purchase intent in regard to marketing, the top three reasons selected were positive perceptions of ingredients, packaging type, and overall packaging appearance. The least selected options for purchase intent influences were negative brand familiarity, overall packaging appearance, and packaging statements. In addition to our findings aligning with previous works, we also verified that preconceived negative or positive brand familiarity was not a contraindication within our study.