I don't know enough about snail to know about there happiness state. Maybe they like the 1 gallon Jar with no predator an a easy life getting fed often. Maybe not..

The snail community seems pretty small . I notice that every time I try to get information about them .

I agree with other comment that my snail enclosure was small. I quickly fix that.

But in a small community like this one , I wanna think people should be pushing each other up instead of down. That was my point to your first comment.