I know that the shrimp cleans off the "bad stuff" off of my fish all the time but now he has moved to the turbo snails - they are turned over and he seems to be cleaning it or worse eating it -
Unless they're already dead- I didn't think that cleaner shrimps where known to eat snails. However, if they are being attacked, you may try target feeding the shrimp, which would reduce the chances they where eating the snails.
I saw one empty shell the other day now it is gone and this guys doesn't look like he is alive - I mean the shrip was pulling the crap out of the turbo snail - damn I have about 10 more TS in there as well - is this another excuse to buy another fish
Last week I noticed a cleaner doing the same thing. I just assumed it was "cleaning" the snail the same way it goes after a fish or your arm. This was the first and only time it happened. I feed the little sob's almost daily so never gave it a second thought. I'll have to keep an eye on them.