You…. dog, chicken, what a turkey, silly cow, like sheep, acting the goat, very catty, bovine, old nag, snake, worm, toad, *****, donkey, ass (English not U.S) gannet, parrot, etc,
Don't forget "rat". Like "he's a rat".
Is a pig word OFFENSIVE in everyday language.
Police officers are called pigs as an insult. I don't know why.