Kitty abandoned by neighbor

I had a neighbor with an indoor/outdoor cat. They moved out a few weeks ago, and for a while I thought they took the cat, until a couple days ago when I heard him screaming outside their back door to be let in. Needless to say, my bleeding heart broke and I set out to catch him due to the terribly cold weather we're having. Right now he's living in a bathroom, which seems a little harsh, but I'm afraid to let him loose with my indoor cats because I don't know a medical history on the cat.

He's neutered, that much I can see. He's sweet,flea free, clear eyed,clean ears, sleek and shiny, very playful and everything he leaves in the litter box looks up to par.

I would eventually like to vet him, but that's out of question for a couple more weeks. Is there anything I should look for? I think he would be much happier out of the bathroom.

Thanks in advance!!

My heart goes out to that sweet little guy, thank you so much for taking him in, you will surely be blessed for your kindness. You are very smart to keep him separated for a while, you never know what you may be exposing your own cats to. There are many articles on how to introduce cats, most likely under the forum 'behavior' or 'caring for strays and ferals'. Keep in mind many diseases are transmitted through deep bites, so go carefully. One thing to definitely look fro is a black substance in the ears, a few spots might be dirt, but if it is thick it may be ear mites, and THAT you don't need spread around. The good thing is that since he is neutered, and looks well, he most likely has been vaccinated. I'm sure your other cats are very curious, you might try confining him to a carrier or cracking the door (but be careful, do not let him escape) and letting them see each other to gauge their reaction, most cats will hiss and back up, but if there is hostile charging or growling while advancing, it will take a while. If you need to rehome him, go on your local radio shows that buy and sell items and tell his story, there may be someone out there that will take pity on him and give him a good home. A sad story helps to prod some into action. Print some flyers with 'abandoned, needs a good home' and hang them around, you never know. Of course if you could give him a home, he would be forever grateful!   All the luck, and please keep us informed!

Thank you for rescuing him.  You really do want to get him to the vet ASAP.  First off you should check to see if he is micro chipped just in case.  Secondly you do want him tested for cat diseases before allowing him contact with your other cats.  So keep him confined until you can get him to the vet. 

Once you get a clean bill of health, you can start cat to cat introductions.  It is not a wise idea to just pluck him down and hope for the best.  Cats are very territorial and it takes time and patience for them to get along.  Some cats will adapt quickly while others can take months and months.  So please be prepared.

I will post a few articles and a video on cat to cat intros.  The key is taking things slowly.  Very slowly.  Most of us rush the process and then end up having to start over which prolongs the entire process.  Move at the cats pace not the humans pace!  Just be sure to not start this process until kitty has been to the vet.

http://www.thecatsite.com/a/the-ultimate-yet-simplified-guide-to-introducing-cats

http://www.catbehaviorassociates.com/a-simple-little-trick-to-use-during-new-cat-introductions/

http://www.aspca.org/pet-care/virtual-pet-behaviorist/cat-behavior/introducing-your-cat-new-cat

http://jacksongalaxy.com/2010/10/01/cat-to-cat-introductions/