I live in an apartment, and I have a rack with six large tubs of rats (about 18 breeder adults). I use Equine Fresh for the bedding (topped with aspen for those who are nursing babies, to provide more warmth to the babies). I change the bedding once a week and there's no rat smell in my apartment. Usually by day 7, I'm getting a whiff of rat, but only when I walk right up by the rack (have to be pretty close to it to smell it). But that's cleaning day, so that's taken care of.

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