Lorri Jensen completed her M.Sc. under the supervision of Dr. Tina Widowski studying the behaviour and welfare of adolescent laying hens, known as pullets. Her research focused on how the stocking density (concentration of animals) in a cage impacts pullet growth, uniformity, behavior, and eventual egg production in commercial systems. Space is one of the most basic needs of an animal in production, and it is often addressed first in livestock welfare regulations. However, most stocking density research does not address the first 25% of a laying hen's life as a pullet. Her research addressed this gap. Part of her project took place at commercial farms in Ontario in barns with standard rearing cages, and the second took place at the Arkell Research Station where she housed pullets in a newer, enriched cage system. In both of these systems she looked at production measures as well as behaviour and welfare of the pullets.
Lori's interest in animal behaviour took hold at age 14 when she did her first animal behaviour experiment involving all the dogs, cats, and horses she knew at the time. She continued to pursue her interest in animal behaviour at Michigan State University where she majored in animal science. During her final year of undergrad, she had the opportunity to work in MSU's Animal Behavior and Welfare Group as a student research assistant. During this time, Lori conducted two of her own research projects involving swine feeding behavior and pig-human interactions.