I house norway rats in the rodent racks using the cement mixing tubs.
6 tub rack:
But I have a few stand alone clear tubs that I used for breeding in the past. Since I now use the rack, the stand alone tubs are used for some grow outs, but mainly ASFS (not pictured, but the exact same tubs).
Haven't had any issues with any chew outs or lack of air flow.
And food hoppers are a must have. Food in bowls are often soiled with urine and completely wasted when the animals scatter their food in their bedding. To be as efficient as possible with little waste, hoppers are the way to go.
My first rodent breeding set up before upgrading to racks. 1 large communal tub for females and grow outs, 2 breeding tubs for several mothers and litters, and 1 male tub.
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