Hi, I think its really hard to say and depends on each baby. My pekingese Snoot is about 13 lbs. and he's so gentle with all of my girls. He's always been this way since day number one. He plays with each of them differently and its like he knows what each one can handle. My one little girl is only 2 lbs. and he just rolls over when she tries to play with him. Its the cutest thing ever. My one other girl is about 3 1/2 lbs. and I worry 10x more when she plays with the others. She's rough and has no idea how hard she plays. I don't think you will truly know until both babies are together. Good Luck!!
