My nerite has been slow to move but has been moving. It's trapdoor will cloise but it tends to be slow. Now it's up against the glass and slowing moving its body back and forth. What is going on?? I only just got him like last weekend. I have video of it moving but I'm waiting for it to...

uhh, i got this ramshorn snail upside down on the bottom. It's been there all day in the same spot. It's retracted in the shell. It pokes out just a bit sometimes. All the other snails are fine.:icon_conf please help... kirk