I have a small mutt (20lbs) named Tyson , he goes out with me everyday to check up on the chickens and the ducks.He loves playing with the hens and doesn't care much about the ducks and we haven't even trained him lol. We got 6 little juvenile hens a couple months ago and all he (Tyson) Chases the juveniles till they give up! He chases them and traps them and kills them! Just kidding, He will trap them and sit there and watch them so they don't run away. I will tell him "Come on! Let him go" Tyson will let the chicken go and then the chicken escapes and then Tyson goes after that sam chicken every time till we go back in the house. I can post some pics later today! I think its funny, we have had him for 2 years and that all he does to the chickens We also got him from the pound, who knew that he would be so awesome with the chickens???