My Russian tortoise gets swollen eyes every now and then and yawns several time a day. And lately she only comes out of her hide to eat, unless I pull her out of it to move around. I don't think she has a respiratory infection because my vet said her heart and lungs sounded fine, and she doesn't have a runny nose, and I don't think she had watery eyes. I just recently changed substrates from alfalfa pellets to eco earth. Could that have something to do with it? The basking temp ranges from 90-95 depending on part of the day, the cooler end is around 73-75. The humidity is usually between 35-45 on the cool end because I only have one hydro meter so I'm not sure on the humidity for the warm end. Coupd it be a vitamin A deficiency? What about the yawning, she does it mostly after waking up, but sometimes through out the day.