My dog weighs 2lb and is full grown the roo is 6lb? And not full grown I hatched him but he doesn't seem like he is hurting her but jumps on her does his thing and let's her go she runs to me barking and growling. I have sprayed him with the water hose pened him up for time out even kicked him gently but enough to get him off her. He won't quit. It maybee time for the sale if I can catch him he has been running from me because of the disapline lessons.