Nsweezie,

I moved to Michigan from CT with 6 cats. I have since adopted 2 more making me an 8 cat household.

There's nothing wrong with it. The only thing you need to do is isolate him (in a spare room if you have one) with his own litterbox, food, water and scratching post (they have real cheap corrogated cardboard scratching boxes at the pet store) till he gets a clean bill of health from the vet and, above all, is tested for Feline Leukemia and Feline Aids and if he is not already, have him neutered.

Once all that is done and outta the way, keep him separated from your cats for at least 2 weeks and then gradually introduce him to them. Rub him down with a towel and let your other cats smell his scent. Do the same thing with your cats, let him smell their scent. They will also sniff under the door too.

After 2 weeks, put him in a carrier and bring him out into the living room and let your cats approach him. The carrier will protect him. There WILL be hissing and growling, that is normal.
Do it a couple of times.

Then, once YOU feel comfortable, try letting him out to scope out your place. Have a squirt bottle handy just in case there is war. As long as there is no bloodshed, DON'T WORRY!!! Your cats will let him know who's boss in the house.

Above all, be patient. These things take time, and won't happen overnight.

Good luck!! I'm glad you're giving him a new home. My saying is "What's one more poop in the box???"

BTW, rule of thumb is there should be 1 box PER CAT.

Please keep us posted!!