Rats don't know not to root around in it. Moist nose + clay or clumping litter = problems.
I wouldn't. Kiln dried pine is just as eay and cheap to come by. If you clean often enough, there shouldn't be ammonia buildup. But then again, they're rats.Ever wonder why people who breed their own feeders typically do so outside of the house? I ditched breeding norways for just that reason, and now only breed mice and soft furs.
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