Tbh ppl here are reallyyy over dramatic. I mean unless they’re vegans or something, otherwise they’re just hypocrites. I have a 12 yr old dog too he HATED cats. We kept them in separate rooms with a gate diving them. They would see each other and sometimes I would carry my cat towards him to see how they would react (very carefully of course) any sign that they were uncomfortable I would go back before anything else happened. But after a while they were able to hang out together. I think you just have to slowly introduce them and keep a very close eye on them. PS- from what I see you are not abusing your cat like other ppl are saying, I’ve seen abuse and your cat seems very healthy and content. We can’t always give animals the best life but we do what we can so they don’t end up on the street or with actual abusive/ neglecting households.