Nope.
A snail is the animal that can hibernate or sleep for 3 years. Hibernating is one way a snail can live through very dry weather conditions.
Because it is comfortable on your window. Leave ir alone.
Slowly.
I have a large apple snail, about a baseball size. I feed it only with Romain lettuce. It survives well.
leaves!
leaves
No, they do not.
Algae, so you don't really need to feed them as they "feed" themselves.
feed it
there in water
vegetables, tomatoes and lettuce DO NOT feed your snail citrus
Twice a day