Hi! I have a few questions about male rats. (I'm getting 2) 1: Would a double ferret nation work? Do I need to mesh-over the bars? If so how do I go about doing that? 2: I've heard putting a rock in their litter box helps. Is this a good idea and how does it help? 3: Would a large bin cage work as a carrier for on the way home? 4: I've heard that Oxbow pellets and veggies daily, with fruits, seeds, and other treats a 2-3 times a week is a good diet. Is that true? And I've heard 15-30 grams per rat of pellets. Is this a good amount? 5: Do I need to be feeding them something else when they're younger? If so what do you recommend? (I'm in the US) 6: What do you want new rat owners to know? Thank you so much!