He's a rescue cat at age 3 he got neutered and shots but he still has BIG FLUFFY BALLS as you can see in https://youtu.be/yG0C0Kp4VXI is this normal for a neutered cat to have balls? My friends who have cats have female ones so I don't have anything to compare to. Another cat owner has also commented that they thought my cat hasn't been neutered because they saw his pair of balls in another video.
Also it's been 3 years since his neutering and shots so do I have to get any of those shots again if he's an exclusively indoor cat who sometimes goes on the balcony but we don't really have mosquitoes up on the third floor. He's usually not around other cats either so I guess not much risk of passing feline to feline diseases? Please advise! Thanks again.