I have a Catahola Leopard Dog (female 13 months) and an American Bulldog (male 30 months) and I may be getting a Catahoula x Pitbull pup. Both the houla and the AB show instinct around my cows but they have not been trained for them. What I would like for them to do is bring them back on command, for instance when its time to milk. Can someone give me some training advice? I take them with me when I walk the cows back and they know the cow names, but they haven't made the connection yet.