You need to find out IF he has mites (if any of those specks are moving) before you try to feed him- since treating for mites is more important than a meal, & the treatment -IF needed- might make him regurgitate a recent meal. So first things first-
Many snakes soak when they have mites- but mites don't always drown UNLESS you break the surface tension of the water with a drop of mild soap- just a drop, NOT a "bubble bath"- and NEVER added to the water bowl they drink from- a soak for mites must be supervised by you, shallow water (not forcing him to swim, not over the snake's "height") about 82*, for about 25 minutes optimally to drown most* mites. (*some may survive by hiding around the eyes & chin & face of the snake- you do NOT submerge their head to drown mites!)
Black (or red or brown) "specks" should always be checked for movement on white paper & with magnification if needed. IF you think a snake has mites, you should keep them ON white paper towels for substrate for at least a month while eradicating them. Mites lay eggs in ALL natural substrates & even if you manage to drown the adults, their eggs will hatch out new generations. Mites reproduce exponentially (fast!) & can kill a snake from blood loss-shock-organ failure. Mites may also spread diseases. Don't under-estimate the danger of mites. If you find even ONE mite, throw away ALL natural substrate and any porous decorations- ie. things made of wood. If you don't, mites WILL return.
Here's a link to various options for treating mites, see post #2: https://ball-pythons.net/forums/show...hat-else-to-do
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Snakes also soak if they're too warm- you mentioned his home isn't over 90* but you didn't say what the "cool" side is? Best to check that too, in case.![]()