Can't neuter my male

Hey guys. So I have a very interesting situation and wanted to know if there was anything I can do for it.... I have a almost one year old make cat who just hit sexual maturity.. Unfortunately he CANNOT get neutered due to his heart condition (he has a severe 4/5 grade heart murmur) he has been trying to get to my female cat who has been spayed for a couple years now... He is starting to mark and has a couple times inside our house... He is not an outdoor car and I don't want my bf to end up throwing him outside... Please help me!!! My bf is pretty allergic to cats but the urine spray smell will highly affect him and his asthma .i also have another male cat but he is neutered and has been for a couple years as they are starting to fight and hiss at each other... I am a huge cat fanatic but am at a loss with my special kitty and yes we have taken him to a vet (that's how we know what grade he has etc) they said with his high of a grade of the murmur the likeliness of him making it thru the surgery is very unlikely

I understand your problem, but it won't go away. Male cats of course do not go into heat like females - once mature, they are ready to mate at any time, as soon as they smell a female in heat, and some will mate with females who are not in heat, or who have even been spayed. Have you talked to your vet about a neuter under local anaesthetic, with maybe a very light sedative to calm the cat? I don't know if that is a possibility, but that is how many farm animals are neutered. The operation itself only takes a few minutes, so it might be a possibility. Otherwise, both you and the cat are in for a difficult time. I wish I could be more positive. Maybe others will have some ideas.

Get a new vet. My wife has neutered cats with a grade 5 murmur before. It all depends on the cause of the murmur, and often just requires more careful monitoring. Yes, the risks are significantly increased, but you are in a position where you can choose

1. Re-home the cat so it can get outside, where it will be happy but possibly live a short and violent life as is the nature of tomcats.

2. Get a second opinion and risk the operation, which means you might lose the cat, but MIGHT end up with a happy neutered indoor cat

3. Live with the fact you are going to have an indoor tomcat, which is a bit like accepting the fact that someone is going to test nuclear weapons and stink bombs in your dining room