My dog was fixed at 6 months, he's now 1 1/2. He still likes to hump the other dogs though. So today he was trying to do just that, and a few minutes later I found him with his "you know what" hanging out maybe 3-4 inches, beyond just the tip you'd normally see. At the other end was a sac. The whole thing was rock hard. I'd never heard or seen of such a thing.
After the initial freak out, I got him to the car to take him to the emergency vet. Then I noticed that it had gone almost all the way back in, except for just the end and he was back to running around like normal.
Z-Dawg--That is exactly what happened to our YorkiePoo! The first time I thought he had a tumor and I freaked out, but not for long as it went back in. I didnt think it happened on fixed dogs though as ours is not fixed??
This part of the anatomy doesn't go away because a dog is neutered. As a matter of fact I had a neutered Australian shepherd breed one of my bitches once. Believe me I was shocked. Neutering only removes the testicles and usually the drive.
Humping isn't always a sexual behavior. Most of the time if there isn't a bitch in season its a dominant behavior. The dog in question is probably trying to assert his dominance on the other dogs in the pack.
Yup, I have to confess the first time my guy woke up from a deep sleep with quite the "going concern" and I saw those glands I was almost on the way to the vet too. Then my husband came in, told me I was a knuckle head and what they were. Glad I'm not the only one!