Ive had the sinlone for 3 or 4 months and the cal king for 2 years. I have a hunch the milk snake had somthing but i have them feeding on f/t mice when they would eat. I have given them some ivamech wormer deluted with mineral oil based on their weight and size before i heated them up. I also have a young Arizonia Mt King that is around the sick snakes and he seems to be fine and eating well. I dont think it is an resiporty infection maybe a parasite?