I don't mean to be rude....BUT...Do you understand that there is an innocent life at stake here???
That Yorkie was your responsiblity. You mentioned that you had a weird feeling about this woman from the beginning? So why on earth did you release that poor innocent and helpless Yorkie to her???
And now this wanting a Vet Letter before you refund, PLEASE stop the nonsense and get that Yorkie back from this crazy person!
I just can not understand how you can let precious time go by. Tell her you will refund her the $600 and get the Yorkie back. Ask her for the Vet bill she is talking about - And honestly, if she has one and it is for a skin allergy, than try to settle it - either pay half or just pay the darn thing. This is not a stuffed animal we are talking about, this is a life and he may be in danger, all over a lousy $600 - Gosh, I just wouldn't be able to sleep at night