[alaskayorkie]

My :02 would be to watch them interact closely. In a perfect world, the adult will teach the pup its limits with a look or a snarl. It shouldn't go beyond that, not in a way where the more delicate puppy could get hurt. If it does, separate them and prevent injury to the pup.

I'm cautious because I introduced a senior Yorkie to the house with a 2 year old, and the 2 year old was rude. He'd try to viciously attack. I figured out he was a toy hoarder, and I mostly solved the problem by addressing that.

Just about the time I thought he was cured, I brought home a puppy, sweetest puppy ever. Again, the adult tried to fight in a way that could have hurt the pup. This was more than hoarding. He just didn't know how to nicely tell the pup to back off.

So I just managed their interaction and told the puppy myself when she was going to far, literally standing between them or separating them when I knew it was about to get rough. The older dog eventually learned he didn't have to solve the problem. I would. As the puppy matured, she learned her limits with my help.

But I think that's a rare case. I've seen other Yorkies welcome newcomers just fine. Good luck! Be sure to let us know how it goes.