What ever my butcher tells me
An animals main value is in it's holding an eco system together some animals are also valuable as service animals, pets or obviously food sources.
Depends if I'm the animal.
same as me probably
A good animal's life is more valuable than bad human's, but not more valuable than a good human's. If I had to choose between pushing a good dog or a rapist off a cliff I'd push the rapist. But if I had to choose between pushing a good dog and a gifted teacher for the handicapped, I'd have to push the dog.
Is the dog behaving the way that dogs are supposed to behave? Is it loyal, loving, gentle, and smart? Can it be trusted not to hurt children, the elderly, other dogs, and non-dangerous strangers? If yes, then it's a good dog.
same as that of a human
if it belongs to me it isnt a animal he or she is my child so worth alot more to me than someone i dont know