Well for what its worth I've (in the past) worked for a number of pet shops, mostly maintaining fish and reptiles.
I never detected a poofer, granted I never had to maintain a sauropod (thank god I guess) but whatever.
I did have to take care of an 11 foot albino Burmese python but I don't know if she ever farted. She did bite me though so I hope I gave her gas.