Key Build Features
- Entrance Hardware: 5-inch or 6-inch schedule 40 PVC elbow fitting inserted into the hole and silicone-caulked.
- Function: Cats crawl up and through the downward-pointing elbow; wind, rain, and snow cannot blow straight in.
7. Stacked Multi-Story Duplex Colony Condo
Two 30-gallon totes stacked vertically and joined with waterproof rivets or heavy-duty zip ties, providing separate upper and lower sleeping chambers for multi-cat feral colonies.
