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4. Make a Cat Litter Box Ventilation System Ah, the wafting smell of cat turds. If you've never taken to the smell, here's a DIY project that'll sit well with you: a litter box ventilation system.

With limited options in the store, my husband and I set out to build our own cat scratching post.

Cat-lover Alan couldn't stand the stink of the litter box in the garage, so he built in a bathroom fan that vents out the side of the house. To smarten up the system, his Mac mini automates the ...