Sphynx is sick, help.

[DeCypher]

My almost 4-year-old leucistic axolotl, Sphynx, is having a bit of an issue. Within the past 48 hours he has become very bloated-like. But he isn't floating, his abdomen is just swelling. Today I tried to feed him, not interested in food. I also noticed a mucous-looking substance coming from his mouth...best way to describe it is it looked like incense smoke.
I'm a bit concerned for him, I've never had a sick axie before.
He's been in the same setup he always has been in.

 

[NeekaLovesYou]

What is he fed on? Although his abdomen looks larger I wouldn't say he looks bloated but it's always worth keeping an eye out for further symptoms. When suffering from bloat their legs and necks usually swell increasingly. Although floating is commonly associated with bloat I've found they don't always float. When one of mine was suffering as apposed to floating, she would be positioned standing up right and was unable to resume her normal position comfortably.