I just ripped all the fiberglass out of my unheated garage (from between the floor joists overhead and against the wall facing the rest of the house) because various areas of it were a) falling down already, b) visibly mildewed, and c) evidenced past rodent infestation. Also, all the vapor barriers were on the cold side.

Is there any insulation that would be less attractive to rodents? Unfortunately, I don't have the ability to seal the garage tightly enough to absolutely prevent rodent entry.