neutered male still aggressive!

Question:
 my 16 month old male cat was neutered at 5 months. he's always been very aggressive since we found him at 5 weeks. we were told he was motherless and really struggled to survive those first few weeks but that he would grow out of the biting behavior. well he hasn't. he is an indoor/outdoor cat and we were informed last night that he has attacked our very sweet neighbor twice and drawn blood on her ankle. she has cats of her own and has always enjoyed our cat as well. we also have noticed he is spraying our cars ,house, etc... he has never attacked my husband or my 2 small children, however, if he is not fed soon enough, or let outside soon enough, he will bite me if he can. help me please find a solution. i don't want any problem with my neighbors or my cat spraying in unwanted areas. we also do love him and don't want to have to send him away. is there a chance he wasn't actually fixed?
Answer:
 Hi Henry's Mom! When I read about your cat attacking your neighbor, I thought "oh my gosh"! How is your neighbor now? If she did not go to an emergency room or a doctor, she should. Please tell her to have the cat bites looked at by a doctor, because cats have alot of bacteria in their mouths; & her bites can get infected. As for your kitty. I have had indoor / outdoor cats in the past, as well as relatives & friends. None of the cats I know of have ever gotten aggressive. Even the feral cats which I have caught, rehabilitated them, shots, neutered, etc & then found new homes for. Your cat has me perplexed. Maybe, while he was outdoors, he was attacked by a more aggressive cat, a dog, or another animal. He might even have been attacked by a human. Then whatever spooked him, to make him attack your neighbor. Did your neighbor perhaps yell at him or scold him in any way, if not today, then in the past 2 weeks? Perhaps she did something unintentionally & he remembers that. Cats can remember up to 2 weeks. Have you phoned your vet regarding this matter? I would definitely call my vet & make an appt to take him in, & have the vet check for EVERYTHING; blood samples, urine samples, etc. Perhaps if you suggest to your vet to keep him overnight a couple days to observe his behavior -- this might help. In this way, the vet can better access the problem. Ont he other site, the members have stated that the aggressive behavior is sometimes an indicator of sick or injured cats. On another cat site, there was a lady having problems with her cat attacking, & they found the cat was stressed out. So the lady had been giving the cat: Rescue Remedy. And there is a calming product called Feliway. But, before giving your cat any medications, check with your vet first! By all means, please take your cat to the vet & leave him there a couple days for observation. Something is definitely wrong & he needs checked out. We no longer let our cats be indoor / outdoor. Around here there are too many raccoons, stray dogs, feral cats & fast traffic. They have been indoor for 10 yrs now. This includes our Charlie who escaped in mid August 2003. It took us 3 months, with the help of cat human traps, loaned to us by a shelter, in order to catch him. When we caught him, the shelter took him, bathed him at their shelter, had a vet check him over, etc. Once we got him back, we also took him to our vet to have him checked out, tested for feline leukemia, etc. Since then, he approaches the door with the other cats, but we just tell him "No Charlie". And he takes off running in the opposite direction of the door. Plus we are being extra careful when he enter & exit the doors. Maybe you should think about turning your cat into an INDOOR ONLY cat. It can be achieved with alot of patience. Please keep us informed of your kitty & your neighbors condition. Since your neighbor also has cats. Have you asked her if she can think of what provoked your cat into attacking her? Maybe she can think of something that we cannot.