Poor thing 

 I hope she gets to keep him!! Maybe he's a yorkie mix

 I'll bet she hated to go to work and leave the little fellow. Make sure you post an update when she gets home and you talk to her again!! Can't wait til you go see him. I wouldn't, personally, worry about the age...if he could bring her happiness even for just a few years, it would be worth it for her and the little dog