What can I do about my cat?

You have too many cats, of course they don't all get on,its like a room full of people,not all of them will like each other.If you do not want to re home any of them you will just have to put up with it.Why not re home the tortoise shell,that would make life a little easier!

First of all, you don't say how long you've had the last two cats. It takes a minimum of 2 weeks to 2 months for new cats to adjust and for the resident cats to get used to the newcomers. The Feliway plug-in will help but it says it takes about a month to start working so you won't instantly see results. I got a Feliway plug-in for my multiple cat household a couple of weeks ago and some of the nervous cats are starting to be calmer so you may see a few subtle changes before a month's time.

Ideally there should be one litter pan per cat plus one extra litter pan, placed in more than one area of the house so no one cat can bully any other cat at the litter pan. I free choice feed my cats dry food from multiple food dishes and they always have access to multiple large bowls of water. I have one cat that one other cat likes to beat up on, she knows if she runs to me and he chases her, I'll squirt at him with the canned air or the air freshener (I don't squirt it on him, the hiss is what stops his bad behavior) and he'll quit harassing her. You can also spritz water on a cat you catch bullying another cat. I use the command, "Leave her alone!" Why this one cat picked out one particular cat to bully, I don't know. I'm hoping the Feliway will help with this bully's behavior but I haven't yet had it long enough to see its full effectiveness.

In my experience cats like kids, seem to do better when you have even numbers. It's possible that getting another female (preferably a kitten-it will adjust and bond faster) might even the odds so to speak, especially if you introduce the females to each other and keep them together awhile and let them bond before you introduce them to the males.

Universal Whisperer has it right, you need to expand the resources available for all your cats. Cat shelves are a great way to provide a shy or retiring cat with a handy perch out of the way of the more aggressive members of the household. They are best placed near to a window so a cat can monitor the outside world.

Your girl needs plenty of places to get out of the way of the others. More nesting places & beds, hidey holes (boxes with 1 smallish hole are good) placed behind the furniture, scratching posts, a couple of cat 'trees'. More feeding stations & water dishes spread throughout the house for all to use. Puzzle feeders can keep them occupied & lots of different toys.

Your eldest cat is trying to mark his territory. He feels threatened by the presence of so many other cats. First you need to clean up to a cat's standard. Some of the chemical cleaners we commonly use leave a smell that cats feel they have to mark over & so they repeat in the same spot.

To clean up to the cat's standard you need to remove the solids & wipe up any residue. Spray the area with a solution of biological laundry detergent. Leave for an hour or two so the enzymes can do their work then mop up & rinse. When the floor is dry treat the area with cat pheromone in a spray bottle not the diffuser following the instructions exactly. Another trick is to feed the cat on that spot. Try some cat treats for a high value snack scattered over the floor. Cats will not toilet where they eat generally.

Feliway diffusers can only go so far on it's own but without extra environmental enrichments it's a waste of your time & money! With all the enrichments mentioned here in place then is the time to use pheromone diffusers again but also to stop you oldest cat's marking behaviour you also need the spray. Following the instructions exactly.

To keep all these cats you may need to establish several different territories or core areas for the two cats that are having the bullying & 'middening' problems. Plus one for the others. This could mean that you'll need to make a couple of extra entrances to your house too using windows & another door with a cat flap. I assume that you let them outside? Do you have a cat flap? You may have to consult a feline behaviourist if you're determined to keep them all.

Several things going on here. First, male dominate situations like yours are always going to torment the female(s), they will always have the need to show their dominance by chasing her away from the food, out of bed, off of the sunny spot--even when he/they have no interest in it. It's just a means of keeping her aware that they are the king and master. Male cats are usually a little bigger then female cats, and some males can kill a full grown female cat. Smart females know this instinctively, and although they hate it and will hiss and might scratch at the male, she'll eventually move away so as not to get hurt. I have but 2 cats, male and female (both fixed) and they've always done this. I can't make them stop. But since my female is about half the size of the male, I gave her cardboard box with a very soft cushy pillow her size in the corner, cut a hold ONLY big enough for her to get through--he tries to reach in but he can't get to her in her little comfy corner. She is also allowed to come up on my desk since she's agile enough to not knock over stuff (he knocks everything over), plus she is allowed on my lap (he's too heavy for my lap, cuts off my circulation)--so she knows there are special places meant only for her. I give the male cat just as much love and attention, but usually just a wee bit more physical (I push him over on my bed (he's used to it now so he's not outraged and loves it) and then I pretend to squash him under me (but I don't, I just make him feel like he's a tiny small kitten that I can boss around) and he purrs like crazy, I do other things with him to let him know he's loved just as much as her.

Your male eliminating elsewhere is usually a sign that he feels (1) there aren't enough litter boxes for the amount of other cats using them and (2) he feels the need to make sure everyone knows he's a macho cat, which he feels depositing in the box where other cats go may not make the statement he wants. In other words, it's his way of making sure he's made it plain he's got territory and he is somebody. I just put down "puppy pads" in the places where the erroneous eliminating is going on, wrap it up as soon as it gets messed on and put down a new one. Not sure what else can be done; seems your eldest is feeling like he's being replaced by the younger set and he's not happy with that.