A housemate began to foster two 11 week old puppies with the intention of keeping only 1. After a few days, I realized I wanted to adopt the second one (they're sisters). She has been caring exclusively for the pups for over a week now and they are closely bonded with her. She's doing a great job and has raised puppies before. If I adopt the second one, how do I make sure she bonds with me, without taking her away from her sister? How do we care for two puppy with two owners in the same household? Her puppy now whines constantly when she isn't around, and my puppy whines when her sister isn't around.