Thanks everyone, the smell was another question i had and i actually thought rats would smell worse but im glad im wrong because i have the rack in my room so that would be the deal breaker. The rack i made i can always make bigger, and i made it to hold two different sized tubs 41 qt and 19 qt so could i use the 41 qt for 2 females and babies, one 19 qt for a single male, and another 19 qt for young ones i plan on using as feeders so they dont get over crowded with the females? I'll post a pic of the rack now to get an idea.