My cat's weird behavior.

[Walleye]

3. My cat is pretty friendly with the cat to come to my back door since they used to be outdoors together

But when he goes to the window in the bedroom, there used to be a group of feral cats living out there, and he always attacked me like it was my fault. He still reverts sometimes at that window even though the cats are gone. Cats are weird. But my back porch cat, who climbs up to my second floor deck, one of the kittens we had neutered and released years ago, he still hangs around.My indoor cat sometimes goes and sleeps by the door to be near him. It’s cute.