Cats were afraid to use the door

Installed this on a cabinet that I had turned into a litter box enclosure. Door swung back and forth without issue when I pushed on it. However, both of my cats were afraid to use the door for whatever reason. I tried to train them to use the door with treats and toys but nothing ever worked. I ended up selling the enclosure to someone else with a cat. Hopefully they’re not having the same issues.

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