Its is certainly a very tricky and touchy subject. I had a slight scare about a year ago with a darwin carpet and it is not a nice feeling. I had owned the darwin for nine years and was my favourite snake. After cooling (which can lower the immune system) when heat returned to normal , i noticed he wasnt as active as normal. His tail was starting to kink and in a matter of a 2 weeks it was progressing up the body. I was scared outa my wits thinking IBD so promptly took him to a well known herp vet in victoria. Kudos to the vet he was very honest but only suggested that there was a chance it could be IBD. Because not enough is known and symptons can differ the only way to test is post mortem. I agreed to have him euthanised (nearly cried) and then had the longest week waiting for results. I was thinking if it is i have to euthanise 24 pythons , which apart from the monetary value is something I wouldnt want anyone to have to do. The vet had concluded it was neurological but told me that there is 5 ways for it to have happened
1. toxic (as stated by wrasse i think which is poisoning or similar)
2. from a blow to the head or fall
3 bacterial (danger)
4 viral (danger)
5 degenerative
The autopsy was done to try and rule out options 3 and 4, which means it was contracted from something.
The results of the autopsy ruled out a bacterail or viral reason, so i was very happy but still didnt answer what it was. I have kept the autopsy result and had no problem with any reptile since but because of the worry have upgraded quarantine and only bought 2 snakes since. It really makes you worry about purchasing animals of anyone.
Stevo