Male burmese python sand-like poo?

I've got a male Burmese Python and his poo had a sand-like substance in it. His cage's substrate is newspaper so i know it wasn't accidentally ingested. He eats rats mostly, but his last meal was his first quail. Is he ok? I took him to the vet a while ago and they said he seems to be fine. I might do a fecal float and smear but i thought i'd ask on here first.