I have trained my kitty to be around my birds (2 guineas, 3 pea fowl, and 2 chickens) ... At first they would eye each other from the other side of the glass windows and doors. Now I put kitty on the lead, and leave him outside, where the birds come up to him. Sometimes the birds or kitty will jump out at each other (I think playfully?). I do believe that they will soon roam together ... I have had cats most of my life, and have always discouraged them from chasing birds. Some may say "cats are predators, and they should be chasing birds, its their instinct". Much the same as some people let their dogs bark incessantly, because "they are protecting me, the house or their territory". Some people take their dogs to training school, to break "bad habbits". Yes, cats and dogs can exist in the wild, and now they are classed as "domestic animals". Well, do we teach them, to be domestic or do we allow them to be "wild animals" living amongst others in the neighbourhood, and likely becoming a nuisance? There is no right or wrong in most things, and is always a belief or interpretation : )