Depends on where you got them.
Snailsinthemail.com claims their snails (Helix) comes from organic farms in California and are parasite free.
I still separate the babies because I feed them differently, so its just easier to put them in a separate tank.
There is no trick to get them to breed, and once they start, there is no stopping them!!
Just put a few adults in a terrarium with about 2'' of soil (any kind) and give them a cuttle bone for calcium, and feed them plenty!!
It takes a while but you will see spots where they have been digging.
That's where you will find clumps of eggs.
I gently dip them up, and re-bury them in the baby tank.
You need to keep the soil moist. If it dries out completely, the eggs will die and dry up.
They look like white caviar

And people do eat them (the adult snails too)
If you let the babies hatch in with the adults, they cling to the backs of the adult snails and ride around.
It's pretty cool to watch, for a nature nerd
