Well if an animal has the ability to speak and wear clothing I'd say it's sentient enough to decide whenever or not it wants to eat chicken, pork, beef or dog if it wants to.
What about Tom then?
He has no ability to speak, not wearing anything, and yet he's sentient enough to decide whenever he wants to eat Jerry or not.
Sometimes he choose to eat him, sometimes he choose to let him go, and sometimes he's friend with him.