My ask is that people thinking that they have to give up their pet due to behavior problems do everything they can to avoid putting them in a shelter.
My orange cat, Zoey, was a kitten that Chris got from a farm in Athens. He got along really well with other cats from the start and despite being a bit of a scaredy-cat of change or new faces, was a pretty well-behaved cat that loved to be around Chris, myself and our other cat as much as possible.
We ordered a cage online that is 3 stories high with room at the bottom for a litter box, and started putting him in there at night. The first week or so he cried all night every night and I felt like a terrible caregiver, but then he stopped. This was 2 years ago and his attitude has completely changed. We open his cage for him during the day, but sometimes he is so comfy on his cat bed he stays in there for a bit. He doesn't mind going in there at night and doesn't make a peep. Also, he completely stopped marking his territory. I think he just needed a place he could call his own since the dog took up so much of the house, and he feels like he has a safe place to go if Kita is particularly annoying. He's still a scaredy cat, but lately he has been inching closer and closer to Kita when he is laying down and I think they may even become friends at some point.
Point of story is that I could never give up my pets to a shelter, where cats in particular are often euthanized due to overpopulation. We came up with a solution that seemed less than perfect, but no one we knew was willing to take a cat that peed everywhere. I'm so happy that Zoey is around, and I spend time with him every day to show him that the dog didn't take his place. Maybe this isn't the best solution for everyone, but it saved our sanity and our room is now pee-free. Consider other options if you have a cat that you really don,t know what to do with, because sometimes the problem is fixable
Kita loves both of our cats and only wants to shower them with kisses; more about his relationship with our tuxedo cat to come later.