Hey all! My birthday is coming up December 1st and all of my friends are pitching in money to get me a critter nation single unit cage, and I'll be using some of my money to get the additional unit. I'm very excited. Does anyone know what all I'll need? What are cage guards / do I need them? I heard rats chew up the trays? What cage cleaners does everyone use? My current cages are small enough to fit in my shower so I scrub them with dawn soap. Also how many rats would y'all recommend for a double unit? Thank y'all and enjoy some rat pics!