Any self respecting veterinarian would administer methylene blue to an animal that is exhibiting cyanosis. I still have a couple of bottles of ancient methylene blue for use if I see a cow or horse with cyanide poisoning.
I had it bookmarked from years ago. After a discussion with a FReeper on the Marfan Syndrome thread, I decided to post it. I have (had) Marfan Syndrome in my family.
OK you have me stumped. What is methylene blue and how can it serve as an antidote to cyanide? (which I always thought was almost instantly fatal.)