I believe a lab would kill a chicken too. I also have an 8 year old choc lab that is the sweetest thing in the world. You should have seen her the first time I let my chickens out into their run. I thought SHE was going to have a heart attack! She will still stand at the pen and stare them down while licking her lips. It's a funny thing to watch. I believe she would kill one in a minute. She loves birds!