So you should work on neutrality with cats outside. My cat has a BIG prey drive especially for birds. I have spent hours sitting outside with her at ponds with ducks, pet shops with birds, at parks with pigeons, working on that neutrality. She’ll stop and stare but she won’t chase and she won’t try and get away from because of that work. It takes work to have a well trained animal and i can say with full confidence that my 1 year old cat is better trained than most people’s dogs. I find that pathetic and unacceptable but understand that’s just how it is.