I think you are making a good decision. I would look around for another breeder, IMO, too.

I personally don't think the puppies should be around the big dogs at all yet...not only the nipping issue, but being stepped on and injured. Swissies are a large breed as well, and my breeder had many adult dogs on his farm, but also had a section just for when the puppies were out to play in...the only adult dogs allowed in that area, were the mother, and some of the older puppies (that he was keeping for himself), like maybe 6 months old or whatever, and not full grown, so they could teach the little ones manners, w/o hurting them.

Anyway, it is a big decision bringing another dog in the house and especially since you have 2 already. I think you and your boyfriend are making a good decision...you have to feel comfortable with your breeder, you'll find a good one and that special pup too!! Good Luck.

Robyn