Bullet is now 4 months and 1 week old, and weighs 2.2 lbs. He's starting to hump, particularly my husband (LOL!) but also on my girl Rio (she's 16 months, but she is spayed). I mean, he wants to hump ALL the time!
I had hoped to wait until his adult teeth came in so that any baby teeth could be pulled at the same time as his neuter surgery. But I'm concerned he is starting to mature and I don't want him to start marking as well. Is he too young to be neutered? Should I still wait until he is at least six months? Are there any bad side effects to neutering at a young age?