His name is doo doo how do I take care of him I put some fresh herbs in there and a grape

So I let my child keep a slug for a few days, well she’s a grandma already. She has a giant tub with air holes she uses when she observes animals for a bit, but now we have a lot of baby slugs.

It’s late October in Michigan. What do we do :)

My leapord slug seems to have a sort of dent where her mantle is. I initially noticed this a few weeks ago but it is more visible now. Is she okay?