i have 4 dogs a lab-mix 10years old, a lab 11/2, a toy rat terrier 3y, and a shihapoo 3y. they live with 50 chickens, 2 guineas, 4 ducks, 3 cats, and 1 rabbit. i have not had any problem with the dogs chasing the chickens. they all are in the same yard. all my dogs know the commands,(NO, drop it and leave it, and out). the humans are their pack leaders and they are the subordinates. thats the only way that harmony can exsist in your home or farm. the dogs have solved alsmost any predictor problem we have had. the only thing that the lab can't seem to kill or deter are foxes and coyotes. my coyote killing dog is getting old and lossing his teeth and has arthritis in his joints.