I hate that nothing has been working and he is still so sick. I keep hoping to find an update with news that he's improving

I'm worried he may have some kind of drug-resistant strain of bacteria. I hope they can find out what it is soon.
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~Magnifique Yorkies~
Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue.