BLUE TONGUE SKINKS

I've been noticing bits of snail in my skink's poop after feeding it to him almost a week ago. Is this normal?

he poops about once every one or two days, his poops are long normal shaped poops, maybe a little off colour than usual. (The snails did give him some nasty mushy piles of poop a day or two after for some reason.)
He's also been turning his nose up atost of the dog food I offer him, but I reckon he's just being fussy

Thanks Edward, thought I'd just check.

Thanks Lea, I had seen that and have gone back to it on occasion after odd looking poops

I didn't expect to see bits of food from last week in it though. Glad its normal.