Snails arent just wild animals they also can be pets to. for example you can have snails to clean a fish tank or you can have one or some by them selfves.
commons.wikimedia.org/wiki/Category:Snails
There are specialist and generalist species that eat
Snails and slugs eat with a jaw and a flexible band of thousands of microscopic teeth, called a radula. Water isn't necessary for the snails as long as their surroundings are humid enough, a bowl of water is recommended as the snails will drink from it and also like to 'bathe' in it.
commons.wikimedia.org/wiki/Category:Snails
If you get a pet snail your going to need to get it a cage. All you need is a contanter with holes on the lide for the snal to breath, soil, plants, water, and leaves or lettes.