So just bought few new snails one seemed to be not moving at all but was still attached in shell. Put them all in display they all started moving around right away except him. Two days later still no movement took him out today to see if he was alive. I touched him no movement and smells a little not much. He is still attached in his shell. Do you guys think he is dead even though he is still stuck in his shell? Should I take him out and put him in trash? Thanks in advance guys