I have got two garden snails in a glass jar which is covered by a thin cloth for ventilation.
For food currently I have given them white rice and powdered egg shells. I have also sprayed the bottom of the glass jar with water to keep the area wet.
I have placed a cardboard in there in a bent position for them to hide and rest.
The only thing that I have not put there is mud. Will it be okay if I don't put mud there? If no, then why is mud be necessary for their happiness and survival? Can it be replaced by something more maintainable and easier to clean?
Is it okay to have lots of leaves as substrate?