[4gracealone]

My concern is that your daughter will 'manhandle' the yorkie and break a leg or neck of the smaller doggie.

You will need to show her how to pet the doggie 'nice/nice' and to be very gentle with her.

As for your mastiff... you may find that the Yorkie will try to dominate the mastiff and become the Alpha dog in the home. Be careful though, if your mastiff is not ready to be submissive, it would only take a little reaction from the mastiff to really hurt/maim the Yorkie.

Yorkies are famous for chasing after much larger dogs and getting themselves into trouble that way.

Recently on the board, a member had to put a Yorkie down because it fell and broke its neck. Yorkies are fiesty yet fragile.

Good luck, I would NOT let the Yorkie be unsupervised around the baby or the Mastiff for the first week.

Take pics and keep us updated.