I'm sorry you're going through this. I've read of this before, and sometimes they split up the dogs, each person taking one, and to me, that's the most heartbreaking. I've even read of one couple who felt that on their own, neither could care for all four dogs, and instead of each taking two, had to rehome all four of them separately. Have you checked out our rehoming forum?
Yorkie Rescues & New Homes Needed - YorkieTalk.com Forums - Yorkshire Terrier Community. One of these little guys are looking for a new home too.