Let me start off by saying that I love the Pet Pal talent. Animal dialogue is generally simple, but fun to read.
That said, I can't be the only one to think that actually trying to talk to animals is immensely annoying, when their primary behavior is to run directly away from the player. I mean seriously, I've chased rats and chickens across entire cities, just trying to guide them into a dead end or corner so I can finally click on them.
It might be realistic animal behavior, but it rather quickly kills my enthusiasm for chatting with the little critters.
Animal critter behavior is, I believe, fine and working exactly as intended.
If you have the Pet Pal talent, rats and chickens are not running away from you. They are perfectly fine with you and will allow you to run right up to them and strike up a conversation, no epic chase across the city required.
What they
are running away from, however, is the other heavily armed and dangerous looking members of your party who do not have the Pet Pal talent. You need to unchain from them (or, if playing co-op, tell your friend to hang back) so you can approach these animals alone with the character who has the Pet Pal talent. Once you've engaged the animal in a conversation, the rest of your group can safely join you.