This is my first post here. I'll post an introduction in that section later with some cute pictures of my little fatheads (this is what I've come to call them), but at the moment I'm struggling to figure out a solution to my problem.
A little background. I adopted 3 little fatheads, 3 brothers just about 8 months ago. I went and adopted the one, but then felt so guilty about splitting him up from his brothers that the next day I went and got the other two. I just got another little guy a few days ago, who is fitting in quite well.
My issue though has always been with one of the brothers constantly showing dominant behavior over another one of his brothers. By this, I mean he is always ALWAYS trying to hump him (I'm sure there's a better way to put that, but I'm sure you get the picture). He doesn't ever bite or attack him but he is constantly rumbling, following him around and humping him. I had them separated with the submissive in a separate cage right next to the dominant and his brother who the dominant one doesn't ever bother. This works, however, the dominant one then is constantly gnawing on the cage and screeching at the submissive one. Just a few days ago, in preparation for my newest addition, I built a 15 sq. ft. C&G cage. I figured with this that I could have all four little fatheads together and that with two different food and drink stations and plenty of hideaways, the constant humping would stop.
Nope, hasn't stopped. Whenever they are active, the dominant is always rumbling and following the submissive and humping him. The submissive is still eating and drinking, but at times he is getting humped while doing this. He isn't particularly stressed, but I worry that he could be much happier without this constant behavior.
One theory of mine is that the submissive has over active anal glands that are attracting the other guy. Sometimes when I hold him I can smell him whereas I have never noticed this with the other fatheads.
Another thing that I've noticed is that when the dominant is rumbling after the submissive, his testicles become engorged and at times his penis will become erect. To me this seems more like sexual behavior than dominance behavior. Maybe I just have a homosexual guinea pig who has found the love of his life? I don't know.
And, I know that many may wonder if the submissive is actually female. I can assure you that he is not. He has um... very pronounced testicles and I have seen him with an erection.
Today, I just couldn't take it anymore and separated out the dominant. Now he is in another room and quite sad. I feel bad because he is such a social guy, but I cannot stand this behavior and I won't let the submissive be constantly having to deal with this behavior.
Any advice and suggestions would be helpful. I know that people say that neutering doesn't solve dominance issues, but when it seems so sexually charged, I wonder if it would. Thanks, it's nice to be here.