That’s so sad! I was hopeful that he might pull through..most vets are specialists in cats and dogs..thats where the money is and it is the most common animal. I learned this when one of my birds got sick and I was told that there is nothing they can do since they only work on cats and dogs. I told them to stop calling themselves veterinarians, but rather cat and dog doctor( which I’m sure they suck at as well). You should write that letter and ask some questions. Percy would definitely have survived if the 1st doctor knew what he was doing. I feel like he didn’ t take into consideration the teeth situation because it came from a little girl. In his arrogance he forgot the fact that the girl knew more about the pets behavior than anybody else..he also forgot to learn anything in vet school about guinea pigs..