Well, Our boxer is one yr old and loaded with energy...we always keep him IN the house while the hens are free ranging and this morning my son looked out the window and see him running in circles by the chickens and yells "THE DOG IS OUT" I run downstairs as did he (our main floor is upstairs) and we threw on our shoes and out the door we ran. Yelled for MAX and here he comes running with foam in his mouth and panting like a crazy dog! I didn't even want to go see what he did. I have 15 chickens freeranging...so we walked down there and started counting...all 15 were there all 15 were FINE! WHEW! I think he was just having fun playing with them and chasing them around. My only laying hen laid an egg minutes after! LOL This is a dog that plays with a hot dog before he sits down and SLOWLY eat it. He's a strange dog.