Hi - I've had my grey for 1 year 4 months and for the first time he killed a rabbit in the backyard. He didn't eat it but tried to bring it back in the house. He left it outside after a bit and came back in. My concern is actually for my indoor cat which has never been a problem. In fact they play a bit -the cat is actually more aggressive than the dog. But now I'm nervous that something bad will happen at night when they are together.