My little boy is 15 weeks and started humping things
about 2 weeks ago. It started with just my husband's arm occasionally but now he "loves" his stuffed animals too
He goes to vet the Saturday for final vaccinations and I am going to schedule his neuter for ASAP. My vet said he can do him anytime so I'll probably schedule it for 2 weeks or so. He is around 3lbs and the doctor feels he should be fine. Talk to your vet about a pre anesthesia blood screen. That may make you feel better.