Trout eat snails?

[23cardinal]

Been bushwhacking along the very low Ramapo and Wanaque lately. Fish are very picky in the lean water. Been picking on the stockies, and occasionally the pq for some browns. I kept a stockie today(gut hooked-I watched him inhale my "secret" bait) and was late on a hook set. Anyways- skinny of it was,he had a snail in his belly. All stretched to fit physical stomach was like a drum, shell was empty but there was mostly digested food on both sides. Someone had something like this - I think this spring. Anybody?

Edit- as others have said- don't recall seeing either river this low