We tought tyke to roll over by first saying "roll over" then manually rolling him over, then acting excited followed by giving him a treat. Took him about 20 minutes and he started doing it on command, with or without a treat. Sometimes he will not do it unless you give him a treat or show him the goods before doing it lol.
Try spinning him around with your hands and pretending like your dog did it on their own, then reward them. |