Thinking about getting another rat?

I've always kept my boy and girl pet rats in the same room but in different cages. Another option for you is if you have the money and know of an exotic vet you could get your boy neutered.

Unless hes a very agressive rat, no he wont get more aggressive. Rats are group animals and do better together even after living a year alone they will be happier with a companion , but if you dont want him to breed try getting a younger male it says to alway get another younger or elderly male... all rats may fight at first , puff there fur, hiss, this may last up to two weeks but they will settle and like each other and play. if your rat is too aggressive though he may have to be in a cage by himslef. you may want a big cage to put him in with the two females if u would want to put them all together. most likey he will get along with a friend in time. they are territorial at first it says too so thats why.

It COULD stress him out - you'd be best keeping them in separate rooms - and he will notice that you are spending less time with him and may resent that - you COULD try introducing them so you can ALL hang out together - BUT you'd wanna be careful that they don't make babies - they breed like CRAZY.

If I were you, I'd just keep your boy and when his time comes then you can get 2 girls. Rats only live 1-5 years (5 is pushing it!)

It could make him a little crazy, but it probably won't as long as they don't come in contact with each other, and as long as the cages are at least 5-10 apart.