We had 2 Tonks, both 3 y/o, [from different breeders]. Bishop suffered from chronic "sinus" issues since we got him, but was never sick as a result. Took our babies to have their "dentals" last week, but Bishop didn't survive the surgery. His lungs collapsed & his heart stopped. They couldn't revive him. We are devastated. There was nothing to indicate something like this was going to happen.

I don't recall reading anything about Tonks having heart & lung problems. Was this just a freaky thing that happened to him?