How stressed a lot of pet cats can be without their owners realizing it, and how much it affects the quality of their mental lives and their health. Cats don't [always] get on with other cats, [and people don't realize] how much that can stress them out. read more
I think cats see humans as large fellow creatures, some of whom are nice and beneficial, and some not. Cats can be picky about whom they live with. If they decide that you are not right for them, they will go feral or change residences. read more