I did the same second-guessing with Shiloh. It's difficult not to in these situations. But it doesn't sound as if Dorian had the strength at the end to undergo a lot of handling. I will tell you what my vet told me about tiels and their hearts when Shiloh got sick in 2022. He said that they are prone to artherosclerosis, just like humans, and Shiloh at 14 1/2 years old had roughly the circulatory system of a 75-year-old person.

Do you know which lab your vet used?

Cathy