Pets in the house, livestock outside.
Dogs, cats, tropical birds, fish, hamster, gerbil, guinea pig, some reptiles and amphibians = pets. (all rodents and cold blooded pets stay caged)
Cows, horses, pigs, goats, chickens, ducks, geese, llamas, alpaca, bison = livestock.
Livestock can be pets but they have to stay outside and are subject to being eaten at anytime.