Paxton Augusta Sullivan

Ms. Paxton Augusta Sullivan

Colorado State University, Fort Collins, Colorado, USA
orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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6 December 2021 in Translational Animal Science
Verified
Journal Article
Open access
PDF file
SMSage Mijares
Sage Mijares
Paxton Augusta SullivanPaxton Augusta Sullivan
Paxton Augusta Sullivan
CCCatie Cramer
Catie Cramer
NRNoa Román-Muñiz
Noa Román-Muñiz
LELily Edwards-Callaway
Lily Edwards-Callaway
While perceptions of animal welfare have been assessed in veterinary students and students internationally, there remains a gap in research concerning undergraduate and graduate student perspectives of animal welfare in animal science programs at colleges and universities across the United States. A survey was developed to assess current animal science student perspectives of the importance of animal welfare as part of their education, their knowledge of available educational opportunities, and resources they think should be included in animal welfare curricula. An online survey was distributed to a national listserv of university administrators of animal science programs in the United States. A total of 624 survey responses were statistically summarized. Most respondents were undergraduate students (78.0%, n = 487), between the ages of 18 and 24 (85.9%, n = 536), and female (86.1%, n = 537). Results indicated that despite most respondents not taking an animal welfare course previously (60.7%, n = 379), most students strongly agreed that the inclusion of an animal welfare course is an important part of the animal science curriculum (72.0%, n = 449), that animal welfare is an important component of their education (63.1%, n = 394), and that animal welfare courses would be helpful for their future careers (70.0%, n = 437). When asked what attributes would be most important in an animal welfare class, students identified many different types of information and resources. The majority of respondents answered that discussing current hot topics in animal welfare (76.1%, n = 475), ethical discussions (76.0%, n = 474), and practical, applied questions (75.3%, n = 470) were important course components. Suggestions for future research include investigating how animal science student perceptions change before and after taking an animal welfare course and exploring opportunities to expand formal welfare education in animal science departments. Inclusion of animal welfare into the curriculum is critical as many of the students currently enrolled in animal science departments will become the future stakeholders in animal-focused industries.

5 September 2022 in Animals
Verified
Journal Article
Open access
PDF file
Paxton Augusta SullivanPaxton Augusta Sullivan
Paxton Augusta Sullivan
SMSage Mijares
Sage Mijares
MDMelissa Kaye Davis
Melissa Kaye Davis
KOKatrina Oselinsky
Katrina Oselinsky
CCCatie Cramer
Catie Cramer
LELily Edwards-Callaway
Lily Edwards-Callaway
Animal welfare is an increasingly important topic across multiple academic disciplines; however, few studies have investigated student perceptions of animal welfare outside of veterinary medicine. The objective of the study was to evaluate animal science students’ perceptions of animal welfare to determine if perceptions differ across animal categories. An online survey was distributed to animal science programs at institutions across the United States. Quantitative and qualitative analyses were performed on 624 responses. Almost all respondents agreed welfare was important for all animal categories (≥97%). The survey asked respondents to rate the level of importance of 12 welfare parameters and there was evidence that the level of importance differed by animal category (p < 0.0001), e.g., fewer respondents indicated having positive interactions with humans was important for agricultural animals. In a subset of questions about agricultural animals, fewer respondents agreed that swine (325, 52.1%) and poultry (268, 43.0%) are raised with an appropriate level of welfare compared to dairy (425, 68.1%) and beef cattle (421, 67.5%). Four free-response questions asked respondents to report their general perceptions of welfare. Thematic analysis identified multiple themes, such as basic needs and human interaction, with most responses (75%) including two or more themes.

1 January 2024 in Translational Animal Science
Verified
Journal Article
Open access
PDF file
Paxton Augusta SullivanPaxton Augusta Sullivan
Paxton Augusta Sullivan
MDMelissa K Davis
Melissa K Davis
MNMahesh N Nair
Mahesh N Nair
AHAnn M Hess
Ann M Hess
DMDaniel F Mooney
Daniel F Mooney
LELily Edwards-Callaway
Lily Edwards-Callaway
Decades of work have focused on reducing fear, stress, and discomfort in cattle during the preslaughter phase by improving and promoting animal handling, transportation, and management processes. Even still, there is limited information about the effects of preslaughter factors on animal welfare and meat quality outcomes in finished cattle in the United States. This study aimed to track individual animals through the slaughter process to identify preslaughter factors associated with key welfare and quality outcomes. A total of 454 cattle from one commercial slaughter facility were studied. Preslaughter factors assessed included distance traveled, truck waiting time, lairage density, lairage duration, and season. Animal characteristics, i.e., body weight, breed, and sex, were also recorded. One trained observer scored the mobility of all cattle using the North American Meat Institute’s 1-4 scale (i.e., normal to extremely reluctant to move). Exsanguination blood was collected and analyzed for cortisol, creatine kinase, and lactate. Carcass bruising was scored using a modified version of the National Beef Quality Audit’s bruise-scoring methodology (i.e., no bruise, one bruise ≤ the size of a deck of cards, one bruise > than the size of a deck of cards, and multiple bruises). Ultimate muscle pH was measured 32 to 36 h postmortem. Multi-predictor models were selected for each outcome variable using Akaike Information Criterion. Continuous outcome variables were analyzed using linear mixed-effect models and categorical outcome variables with mixed-effect logistic regression models. Longer truck waiting times were associated with increased cortisol (P = 0.04) and lactate (P = 0.02) concentrations. Similarly, increased lairage duration was associated with increased creatine kinase concentrations (P = 0.05) and the odds of cattle being bruised (P = 0.03). Less space allowance per animal in lairage was associated with increased odds of cattle having impaired mobility (P = 0.01). There was a seasonal effect for many of the measured outcomes; the summer season was associated with greater lactate concentrations (P < 0.0001), increased odds of impaired mobility (P < 0.0001), and increased odds of carcass bruising (P = 0.003). The findings of this study indicate that many of the preslaughter factors assessed influence critical welfare and meat quality outcomes of finished beef cattle, warranting future research and consideration. Animal welfare is an integral component of beef cattle slaughter, with regulations, industry guidelines, and company-specific programs ensuring standards are met to minimize stress and discomfort during the preslaughter marketing process. This marketing process involves many inherent stressors, including various environmental and human factors, which may have negative impacts on cattle welfare and meat quality. This research aimed to investigate the relationship between several preslaughter factors (i.e., distance traveled to the plant, truck waiting time at the plant, space allowance and time in holding pens, and season) on physiological stress parameters, mobility, bruising, and dark cutting in a population of finished beef cattle at one commercial slaughter facility in the Southwestern United States. Results of the study indicate that truck waiting time, space allowance, and time spent in holding pens are associated with physiological stress parameters, cattle mobility, and carcass bruising. Additionally, the summer season is associated with negative animal welfare outcomes. This data underscores the importance of the preslaughter period on cattle welfare and meat quality and identifies areas for continuous improvements such as reducing truck waiting times, shortening the time cattle spend in pens, and providing more space for cattle at the plant.

2 December 2022 in Frontiers in Animal Science
Verified
Journal Article
Open access
MDMelissa Davis
Melissa Davis
Paxton Augusta SullivanPaxton Augusta Sullivan
Paxton Augusta Sullivan
JBJimena Bretón
Jimena Bretón
LDLauren Dean
Lauren Dean
LELily Edwards-Callaway
Lily Edwards-Callaway
Introduction: The impact of pre-slaughter management practices on fed beef cattle welfare is a multifaceted and well researched subject matter. Factors such as transportation, handling, lairage time and several animal characteristics can directly impact the cattle’s behavior, mobility, blood lactate and cortisol levels, likelihood of injury and ultimately overall cattle welfare. Animal welfare continues to grow as a critical component of slaughter in the fed beef industry, yet a formal review of related research does not exist.Methods: A scoping review was performed in order to (1) catalog pre-slaughter management factors that impact fed beef cattle welfare at the time of slaughter, (2) identify indicators used to evaluate the impact of pre-slaughter management on fed beef cattle welfare at slaughter, and (3) gain further understanding of the relationship between pre-slaughter management factors and fed beef cattle welfare outcome indicators at slaughter. Three data bases were ultimately searched: PubMed, CAB Abstracts, and Web of Science. The concepts used in the database searches were the population of interest (i.e., fed beef cattle), the location in the supply chain, preslaughter management factors, and welfare outcomes.Results: A total of 69 studies were included in final analysis for this review, including studies from six geographic regions around the globe. Studies involving alternative slaughter methods (e.g., religious stunning or mobile slaughter) were not included in the formal analysis of this review, but still merited an in-depth discussion within this paper. After reviewing the studies, a total of 37 pre-slaughter factors and 69 indicators of welfare were measured throughout. Pre-slaughter management factors were then categorized by: animal characteristics; environmental characteristics; handling; lairage; transportation; and water/feed. Outcomeindicators of welfare were categorized into: behaviors; health, injury and disease; physiological; and stunning and insensibility.Discussion: Pre-slaughter factors relating to transportation and handling, and welfare outcomes measured by behaviors and physiology were of the most researched throughout the studies.The results of this review offer a catalogue of commonly researched factors and indicators of welfare measured during the pre-slaughter phase, as well ast he relationships between them. This review also offers further substantial evidence that a multitude of events in the pre-slaughter phase affect fed beef cattle welfare and a collection of highly applicable welfare indicators to expedite further research on the effects of pre-slaughter factors and the application of improved practices.

1 January 2024 in Translational Animal Science
Verified
Journal Article
Open access
PDF file
MDMelissa K Davis
Melissa K Davis
Paxton Augusta SullivanPaxton Augusta Sullivan
Paxton Augusta Sullivan
AHAnn M Hess
Ann M Hess
MNMahesh N Nair
Mahesh N Nair
DMDaniel F Mooney
Daniel F Mooney
LELily Edwards-Callaway
Lily Edwards-Callaway
Preslaughter management factors and their impacts on cattle welfare and meat quality are well documented in current literature. However, certain management factors related to transportation and lairage are underrepresented. Benchmarking preslaughter management factors that can impact welfare and meat quality outcomes will allow the industry to identify areas for improvement. The objective of the current study was to benchmark preslaughter management factors for a nationwide sample of commercial fed cattle processing facilities. Five processing facilities in the West, Midwest, and Southwest regions of the United States were sampled from March 2021 to July 2022. Data were collected on a total of n = 637 slaughter lots representing n = 87,220 head of cattle. Variables of interest included general cattle characteristics, distance traveled to the plant, truck wait times to unload, environmental conditions, lairage density, and lairage duration. Additionally, mobility was scored using a four-point locomotion scale (one being normal, not lame, and four being extremely reluctant to move). Carcasses were also observed for bruising using the following scale: no bruises, bruises smaller or larger than a deck of cards, and having multiple bruises. Descriptive statistics were performed on the data at the lot and individual animal level. On average, cattle traveled 155.8 ± 209.6 km (mean ± SD) from the feedlot to the processing facility and waited 30.3 ± 39.7 min to unload. Once in lairage pens, cattle were held for 200.7 ± 195.0 min. The mean lairage stocking density was 3.1 ± 2.0 m2 per head. A majority of the cattle scored a mobility score of 1 (n = 77,645, 91.8%), 7.8% (n = 6,125) were scored as a two and the remaining less than one percent of cattle were scored as either a 3 or 4 (n = 265). Carcasses with bruises less than or equal to the size of a deck of cards (n = 22,672, 27.1%) were less frequent than bruises measuring greater than the size of a deck of cards (n = 34,427, 42.6%). Of carcasses that were bruised, 65.2% (n = 39,856) had multiple bruises of varying size. This baseline data on preslaughter management factors identifies opportunities for improvement in wait times, lairage densities, and factors that cause bruising. Future studies should explore the relationships between these factors and their impacts on welfare and meat quality, report the economic value of these outcomes, and explore industry acceptability and adoptability of optimal preslaughter management practices.

1 April 2024 in Journal of Dairy Science
Verified
Journal Article
Open access
LELily Edwards-Callaway
Lily Edwards-Callaway
SMSage Mijares
Sage Mijares
COClaire Okoren
Claire Okoren
CRCorley Rogers
Corley Rogers
Paxton Augusta SullivanPaxton Augusta Sullivan
Paxton Augusta Sullivan
IRIvette Roman-Muniz
Ivette Roman-Muniz
The significant role of dairy caretakers in maintaining animal welfare on dairy farms emphasizes the necessity of appropriate training and education to ensure the implementation of practices that promote good animal welfare. This study explored the potential of case-based learning as a novel approach to training for dairy caretakers by investigating dairy caretakers' perspectives on case study discussions. Additionally, this study sought to understand thoughts and feelings of caretakers during case study discussions to help identify information that caretakers use to evaluate cases and make decisions. Two case studies were developed and presented to participants, and thematic analysis of case study discussion transcripts was performed. Pre- and post-training questionnaires for 21 caretakers (n = 21) were summarized. The study found that caretaker reactions to case studies were generally positive. Thematic analysis revealed that caretakers use previous knowledge to make treatment decisions for cattle, and valued discussion with coworkers. The results of this study suggest the need for further investigation into the use of case studies and other activities that provide opportunities for critical thinking as training opportunities on dairy farms.