My 4/5 year old corn snake has ha this occasional thing that sounds like a small sneeze type sound like a pffff. I have taken him to a vet who looked at him checked he's mouth nose etc couldn't see any other signs of a respitory problem. He have him fortum antibiotics and I am giving him he's last shot today 5 in total one every third day. He still does it but it's not on every breath it's every few minutes and it's when he put an I'm and I'm handling him. I asked the shop owner I bought him from for a second opinion and he said just keep an eye on him and see if it develops into anything more symptom wise. Could it be something else doing it as he's acting he's normal self still eating and everything and active when he's out he's tongue is flickering fast as normal. He is overweight which was my mistake as I fed him weekly so he's going on a diet as he weighs 1.2kg Any opinions would be helpful he has no bubbling or mucous holding he's head up or mouth open it's just a very occasional pfffft sound. He's been on paper towels since injections too just to make it easy to clean .