If I have Poison, can my predator eat my own prey?
A: Sorry, no. Poison makes ALL of your Keepers poisonous. If you have Poison, no one — not even you — can win by eating your Keepers because they are poisonous. For example, if you have Poison and Fish and the Goal is Bears Eat Fish, no one can win because those Fish are poisonous, no matter what player has the hungry Bears.