Lately Chase has been leaving the backyard; going to the front yard, the trail, next door. When we call him he either is ignoring us or he can't hear. So my thought is maybe I can teach Missy to herd him or block him. She used to "herd" her puppies into a certain areas and she "herds" the cats. What I would like her to do is block him if he tries to leave the yard and if he does "herd" him back on command. Do you think this could work, if so how would I teach this. It would be a cool trick and would be helpful. We don't leash him because we don't have the time in the morning and he enjoys being off -leash (he practically is never leashed).