I'm not totally sure about that. I wouldn't think so, as they have sugar gliders, so they're really careful about chemicals. they're house is a little dirty (as seen by the pics xD), but when he was out, he was on their person. What kind of chemicals would kill that quick??
I don't have a clue what could do it that quickly, but just by the look of the belly thats the only other thing I could think of that could cause a burn if it wasn't a heat related burn.