This led to a fun discussion about what animals have it best, and hence which we'd want to be. Katrina wanted to be a tiger, Gabriel a cat, and Julian, believe it or not, a raven of all things -- so he could fly free.
I don't know, I think I'd want to be an animal that leads the most leisurely life, with little food stress or risk from predators. Honestly the closest I can think of to that is a domesticated cow....other than that being-led-to-slaughter thing at the end, they seem to have it about perfect. No cow ever had mounds of laundry or cleaning facing them!