The plural possessive form for the hole of the mice is the mice's hole.
The singular possessive form for the hole of the mouse is the mouse's hole.
The word dotting is not a noun. It is a verb.
No it's a noun.
Noun
No, it is not an adverb. Disappearing is a verb form, and a gerund (noun).
No, it is not an adverb. Napping is a verb form, and gerund (noun). There is no related adverb form.