We brought our 2 year poddle when we bought this house.We got chickens and the like afterward's.He is about 8 now.He has Never killed any bird here.I used to have a pic of one of the birds sitting on his back.He does do the dummy chase once in a while lol.He like's to run and play but he's been really super around the bird's.We have had turkey,geese,guinea rabbit's we have inside pets too.All dog's are different and some may be more agressive than other's.I have had livestock killed by neighbor dog's.I had ducks done in by a neighbor's jack before then someone abandoned one here once and it didn't bother any of the bird's.I have had a Heeler kill bird's/ lab's.We took in a nice looking Pom mix this summer but had to place him Only because he was car chasing.He was flake around the birds a couple of days but then was OK with a little scolding.But he was a nice looking Loving good dog other than being a tire eater.He got a really good home though.It's trial and error really.