I don't give a rats ass what anyone says, don't touch your boas until they've digested for at LEAST 5 days. ESPECIALLY if they're new to your collection. also, do NOT feed your boa for at least 3 weeks from now. you absolutely must give it time to heal. i say three b/c i know most people wont wait 4. also, you'll want to visit the vet (preferably w/ a fresh fecal sample) and have your animal tested for parasites. also, don't believe the whole, "it's CBB, it CAN'T have parasites" load of crap. cbb animals can and do have parasites. they can get them from all kinds of places. food, mostly. being housed w/ other animals, insects biting them. all kinds of places. so anyway, back to YOUR animal.
your next feeding should be a prey item about 1/3 or less the size of a usual prey item. IF your boa keeps it down, wait another 3 weeks and feed the same size prey again. then repeat again. then step up the prey item size to 2/3 the usual size for three, three-week apart feedings. then you can get back to the usual size, but keep the feedings at least a couple weeks apart (just for the overall health of the animal).
you may also want to look into tubing some pedialyte or even plain ol' water. i tubed one of my animals many times after a gurge before feeding to replace lost fluids and in one tubing, i added a little NutriBac. It's the "good" microflora in your snake that can sometimes be depleted by a gurging/treated for parasites animal. but don't go overboard, too much of a good thing can still be bad.
anyway, this should get you started. this regimen has helped me in the past. be sure you get your snake to the vet for a check-up, no telling what's up w/ it.
good luck, jb
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Jonathan Brady
My Kingsnake Photo Gallery