We have a German Shorthair Pointer pup (Mocha) (she is almost 10 months old and is about 55 lbs) and then Pippin, who is 14 weeks, 3 lbs. They want to play so badly, they both have very large metal crates (houses) they live in during the day that are right next to one another. Mocha is SO hyper and still a little clumsy. I tried once to have them out together and watched Mocha's feet REALLY carefully but she ended up head-butting poor Pippin and now his left ear is a little floppy at the tip. He's fine otherwise. My coworker has a GSP and a Yorkie and when her yorkie was little, her GSP accidently stepped on him and broke his hip. So...my question is for those of you with big dogs and chi's, how do you integrate them safely or do you keep them separated? Thanks in advance.