Does anybody have any suggestions on how i can stop my puppy chasing my cats.We have had buddy the pup for 3 months he is now 6 months but he will insist on chasing the cats.I have got 4 cats one of them as smacked him so he doesn't chase him now cause he's scared of him but the others won't smack him and just run away from him with him running behind.I'm just abit scared that one of them is going to end up hurt cause they run so fast around the house.I have tried holding him back but as soon as i let go he's off to find where they are.