Research

Sanctuary-Based Research

Research

Sanctuary-Based Research

Our groundbreaking research was featured on the front page of The New York Times science section! Read the story here.

Farm Sanctuary’s sanctuary-based research program is a multidisciplinary program that, within a sanctuary framework and through a social justice lens, draws upon animal ethology, philosophy, animal welfare science, veterinary medicine, multi-species ethnography, and other disciplines. Our research aims to:

support human understanding of the nature and lived experience of farm animals, as individuals and species;
explore the mutually liberatory potential for human-animal relationships and community in a sanctuary setting; and
support holistic emotional, social, physical, and community care; and explore radical modes of listening, observing, and understanding the expressed desires and agency of farm animals.

We recognize that research methods have the potential to perpetuate oppressive hierarchies and systemic inequity and injustice if researchers are not intentional about engaging in counter-oppressive research practices. Our mission is grounded in a commitment to continuously interrogate and evolve our methodology to counter potential harm and the perpetuation of oppression. That commitment includes, but is not limited to, working to ensure that our research approach counters practices that reflect the logic of human and white supremacy by centering racial justice and the care, needs, and interests of animal residents.

Original research is conducted at the sanctuaries by both our research staff and external researchers in alignment with Farm Sanctuary’s research ethics guidelines. All research at Farm Sanctuary must be designed and carried out with the animal residents’ needs, preferences, desires, health, and safety as top priorities and will either improve welfare, restore agency to the residents, or both. Research should be designed in such a way as to avoid instrumentalization of animal subjects. For example, many research projects highlight the ways that nonhuman animals are similar to humans, but this notion serves to create a hierarchy that places humans at the top and suggests that nonhuman animals who are more like humans are more deserving of our compassion. Research with sanctuary residents should express equal respect for all species as well as individual differences between members of the same species.

Research with the Animals Advisory Committee

Farm Sanctuary has convened a Research with the Animals Advisory Committee to guide our research program by ensuring high levels of scientific rigor and alignment with our research ethics guidelines.

If you are interested in conducting research at Farm Sanctuary, please see our call for proposals!

Call for Proposals

Melisa Choubak

PhD

Becca Franks

PhD

Lori Gruen

PhD

Lori Marino

PhD

Alan McElligott

PhD

James Reynolds

DVM

Current Research

Do residents who have histories of trauma exhibit symptoms of PTSD?

Farm Sanctuary researcher with cotton swap next to calf in a large grass field

Over the past two decades, researchers have explored the existence of post-traumatic stress disorder (PTSD) in nonhuman animal species. However, these investigations have focused primarily on species that remind us of ourselves, namely elephants and chimpanzees.^1–4 In humans, PTSD is defined by exposure to one or more traumatic events (i.e., exposure to actual or threatened death, serious injury, or sexual violence) followed by one or more characteristic symptoms, including recurrent, distressing memories, dreams or flashbacks and intense or prolonged psychological distress or physiological reactions at exposure to cues that resemble an aspect of the traumatic event.⁵ The life of an average industrially farm animal allows for many of these traumatic events that could trigger PTSD symptoms. Farm Sanctuary provides a home for hundreds of chickens, pigs, turkeys, cattle, sheep, goats, and ducks, many of whom likely experienced trauma prior to arriving at sanctuary. This research seeks to utilize behavioral observations as well as caregiver reports to identify whether sanctuary residents exhibit symptoms in line with the DSM-V criteria for PTSD in humans.

If farm animals are found to be capable of suffering from PTSD, what might that mean for the way society views and treats them?

Do chickens express behavioral and physiological indicators consistent with joy in response to learning?

Understanding what someone wants is imperative to providing them the opportunity to have a good life. For nonhuman animals in captivity, those responsible for their care and well-being must strive to understand the interests and motivations of those they care for.^6,7 Historically, caregivers and welfare scientists have focused on the physical elements of animals’ environments; however, we now know that learning opportunities are essential to an individual’s overall well-being.⁸ Empirical evidence of the motivation and desire to learn has been recorded in many species. Rhesus monkeys engaged with a puzzle box, even in the absence of rewards, and their engagement decreased as their error rate during solving attempts approached zero.^9,10 In other words, the monkeys became less interested in solving the task when there was nothing new to learn. Learning success has also been shown to correspond with measures of positive emotion in cattle,¹¹ goats,¹² and pigs.¹³ Researchers have observed that cows express behaviors that may indicate joy or excitement during what appear to be “Aha!” moments in learning.¹¹ Cows who had success in learning had higher heart rates, moved more quickly toward the reward, and jumped, bucked, and kicked more than those who did not have the opportunity to learn. Positive emotions, such as joy, are an essential component of positive welfare and necessary to provide captive animals with a life worth living.^7,14

Chickens, like other animals, experience both positive and negative emotions,¹⁵ though research on this topic has been limited ¹⁶ and largely focused on emotions like fear.¹⁷ In general, scientists attach a positive valence to emotions in situations where an individual approaches or seeks out the stimulus (e.g., mealworms are sought out by chickens and are thus thought to elicit positive emotion¹⁸). Conversely, a negative valence is ascertained in situations where the individual avoids the stimulus (e.g., a puff of air¹⁹). Chickens are also capable of learning to solve problems.^20,21 Yet, their emotional responses to their own learning have not yet been rigorously explored. This study aims to address that gap in knowledge by investigating chickens’ emotional responses to learning.

If chickens experience joy while learning, what might that mean for the way society views and treats chickens in the animal agriculture industry?

Research in Action

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References

Bradshaw, G. A., Schore, A. N., Brown, J. L., Poole, J. H. & Moss, C. J. Elephant breakdown. Nature vol. 433 807 (2005).
Bradshaw, G. A., Capaldo, T., Lindner, L., Grow, G. & Director, S. Building an inner sanctuary: Complex PTSD in chimpanzees. J. Trauma Dissociation 9, 9–34 (2008).
Ferdowsian, H. R. et al. Signs of mood and anxiety disorders in chimpanzees. PLoS One 6, e19855 (2011).
Rizzolo, J. B. & Bradshaw, G. A. Prevalence and patterns of complex PTSD in Asian elephants (Elephas maximus). Asian Elephants in culture and nature 291–297 (2016).
American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. (American Psychiatric Association, 2013).
Franks, B. What do animals want? Anim. Welf. 28, 1–10 (2019).
Yeates, J. W. & Main, D. C. J. Assessment of positive welfare: a review. Vet. J. 175, 293–300 (2008).
Franks, B. & Higgins, E. T. Effectiveness in Humans and Other Animals: A Common Basis for Well-being and Welfare. in Advances in Experimental Social Psychology (eds. Olson, J. M. & Zanna, M. P.) vol. 46 285–346 (Academic Press, 2012).
Harlow, H. F., Harlow, M. K. & Meyer, D. R. Learning motivated by a manipulation drive. J. Exp. Psychol. 40, 228–234 (1950).
Harlow, H. F. Learning and satiation of response in intrinsically motivated complex puzzle performance by monkeys. J. Comp. Physiol. Psychol. 43, 289–294 (1950).
Hagen, K. & Broom, D. M. Emotional reactions to learning in cattle. Appl. Anim. Behav. Sci. 85, 203–213 (2004).
Langbein, J., Nürnberg, G. & Manteuffel, G. Visual discrimination learning in dwarf goats and associated changes in heart rate and heart rate variability. Physiol. Behav. 82, 601–609 (2004).
Zebunke, M., Langbein, J., Manteuffel, G. & Puppe, B. Autonomic reactions indicating positive affect during acoustic reward learning in domestic pigs. Anim. Behav. 81, 481–489 (2011).
Mellor, D. J. Updating animalwelfare thinking: Moving beyond the “five freedoms’’ towards “A lifeworth living”. Animals 6, (2016).
Zimmerman, P. H., Buijs, S. A. F., Bolhuis, J. E. & Keeling, L. J. Behaviour of domestic fowl in anticipation of positive and negative stimuli. Anim. Behav. 81, 569–577 (2011).
Marino, L. Thinking chickens: a review of cognition, emotion, and behavior in the domestic chicken. Animal Cognition 20, 127–147 (2017).
Jones, R. B. Fear and adaptability in poultry: Insights, implications and imperatives. Worlds. Poult. Sci. J. 52, 163–174 (1996).
Moe, R. O. et al. Trace classical conditioning as an approach to the study of reward-related behaviour in laying hens: A methodological study. Appl. Anim. Behav. Sci. 121, 171–178 (2009).
Edgar, J. L., Lowe, J. C., Paul, E. S. & Nicol, C. J. Avian maternal response to chick distress. Proc. Biol. Sci. 278, 3129–3134 (2011).
Marley, E. & Morse, W. H. Operant conditioning in the newly hatched chicken. J. Exp. Anal. Behav. 9, 95–103 (1966).
Hazel, S. J., O’Dwyer, L. & Ryan, T. ‘Chickens Are a Lot Smarter than I Originally Thought’: Changes in Student Attitudes to Chickens Following a Chicken Training Class. Animals (Basel) 5, 821–837 (2015).

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