Liz Buchanan BVSc MRCVS
Hello - I'm sorry to hear about your dilemma. It sounds frustrating and difficult for everyone. Cats are not as well evolved for group living as dogs and people are; even cats that rub along together well in a house like to have their own separate territory within it. You can help by watching carefully to figure out whether the territories are for each cat, and putting each cats' resources on their own territory. Valued resources for cats include food bowls, toileting sites (or doors to get to an outdoor toileting site) and water. If a cat has to walk across anothers' terrotory to get to these things, ruptions often arise. Therefore, carefully thinking through the positions of bowls, beds etc can be very important. However, rehoming may be necessary and if this is the case, then kittens are easier and more happily rehomed than older cats.