I got one female that looks like she will pop at any minute but she has been like that since i got her. Not sure if she eats everything in sight or maybe has parasites? I treated her for it when I first got her.
And hav come to the conclusion that my snails do not like ferterlizer. I use it and next time I look, they are inside the shells.I don't remember if I first started noticing the closed doors before or after I added the live plants. It's only the trapdoors that clam up not the nerite and it has no effect on the rabbit snails either. Maybe it has nothing to do tiwh the mopani wod after all