Several birds like chicken are distant relatives of dinosaurs that once ruled the land. A study at a University in Chile decided to check out the motion of chicken, if they were to walk less like birds and more like dinosaurs.
To get the result, they raised a fowl from birth who was given a prosthetic tail. The idea was to change the usual knee-driven bipedal locomotion in the birds to a more hip driven locomotion that is usually seen in crocodiles. We have no idea what the benefits of the study are, but watching the chicken do a T-Rex walk is probably result enough.