I had a cat I had to rehome because she was just so unhappy no matter what we tried. Vet visits, space, time, she hated being in my home. I had two other cats at the time who were happy and healthy and love being in our home…I rehomed that kitten so she could have a chance to be more comfortable. She went with a coworker, she is now playing and running around. She is social and thriving. I ended up rescuing a cat a month later that is loving his home with us. Sometimes it’s not even about inability…sometimes it’s just being incompatible.