I know how hard it is to leave. I go through the same thing. I can't stop thinking about her when we're gone. My kids (3 are adults now) think I'm crazy for calling to check on the dog. I think the 13 year old feels slided. It's just that they aren't as little and helpless anymore like Roxie is
. Anyway your lucky you have a friend to watch who also has a yorkie. That gives your baby a playmate plus someone with a love and understanding of the breed to be watching. I don't think they ever forget an owner who loves them so much!!