They are both neutered and spayed and I think the male cat is a little territorial because a few years ago a stray was roaming around and his tale was puffed up but he wasn't hissing just making this loud meyowing(sounds like he's saying rallroww) just like the sound h makes in he car so idk if he's afraid or doesn't like other cats? Thanks muchh!

This is seriously not a laughing matter! No sarcasm pleasee.