Ok so I am a fairly new snake owner, I'm gonna go ahead and give some basics to my pet's story before I ask questions.
I'm the owner of a yellow corn snake and have been since late February of this year. I have a good friend who works at a petsmart, and about that time a woman came in and dumped this poor snake, citing that her daughters weren't taking good care of it and she was tired of having it. I don't know why, but apparently petsmart is the place to take animals if you are 1) tired of them, and 2) and idiot. ANYWAYS, no one wanted to take the poor baby, and of course, I'm a sucker for animals, so I agreed to adopt her. I knew very little about corn snakes, but this friend of mine has one of her own and she has been a huge help and great teacher. So I got everything i needed for her, the aspen bedding, hide, heating lamps, dish, etc. She seems about 1.5-2 years old, although nothing is certain. either way, last night I noticed that she was sounding quite sniffly, just like we do when we catch colds. I took her to my friend for her opinion, and of course did some online research, and we of course came to the conclusion that is is likely that my poor esmerelda had an upper respiratory infection, and has likely had it, progressing, the entire time I've had her. First thing this morning I got her into the vet. He took a look at her, and first of all alerted me to the fact that esmerelda is a boy! He took a poop sample to test for parasites (she conveniently pooped in the box)and looked in her mouth for excess mucous (at this point, she has had none come out of her nose, she's just kind stuffy sounding, but still able to breathe from her nose fine). So HIS test came back parasite-free, which is fortunate, and the vet doesn't think he has a URI, which is great news. He said that perhaps he could be developing one, which if his symptoms don't leave then to come back in another week or so for antibiotics, but that he belives he is allergic to his aspen bedding substrate. He said it's very rare but he has seen it before, and recommended I change the substrate to non-oily reptile bark, which I have since done. He seems quite happy, i've added a hide to the cool side of his home, in addition to his warm hide, and have increased his heat on the warm side as well.
My question is, has anyone every encountered a problem with aspen bedding substrate before? I know the vet said this was rare, so perhaps I just got a special corn snake, but it concerns me that his stuffy nose may not be cured by the substrate change. I'm just wondering if anyone has had experience with this substrate issue that was fixed by a switch in materials and not by antibiotics.
Thanks for reading 
Rachel

