I've been racking my brains for days over these parasites, it takes a long time for me to remember things........snail speed!!!
I knew I'd heard of something natural that helped cure worms in humans........just now while cutting a melon I remembered........Pumpkin seeds! I've just done a search and it's true ;D There are lots of references to it. So if the snails will eat them maybe they will help them too!
I've had a look through all those articles and I did some more research and it does seem to be worth a go. So I've just bought and ground some and fed it to my tigers. Two of them are still eating it now, one didn't seem that interested.
I keep you posted on results, so far I haven't found any worms or parasites so if they pass some now, I think we can be reasonably confident that it is the pumpkin seeds.
Even if it doesn't get rid of them all, a regular dose as we discussed in another thread should help limit them and that can't be bad.