Hi. I have the snails for almost half a year and they do a great job on cleaning my walls. But yesterday I noticed that one of them act weird, it stay on bottom half open. It’s alive and close every time when I touch it, a couple seconds later slightly opens again. When I put it close to the rock or wall, it’s open completely and suck to it, but soon after I find it Ln close but it’s place in the same position. what it can be? And can I do something?



