Question regarding pig aggression

My family and I are raising American Guinea Hogs. We currently have a breeding pair with a boar and sow, and a separate intact boar we are raising for pork. The separate intact boar is the offspring of our breeding pair.

Now, the intact boar is roughly 11 months old and has been raising the ire of his father. We have these boars in separated pens roughly 75 yards apart and yet at certainly monthly intervals, this father boar will do everything in his power to get at his son 75 yards away and kick the crap out of him. I suspect this is coinciding with our sow going into heat. I apologize if there are other sources that reference this scenario but everything I see regarding pig aggression is either over food or wild pigs. Strangely, doesn't seem to be much specific literature on boars fighting on a schedule.

Questions

1. Will boars go full aggro around the time the breeding sow goes into heat even if there is an already dominant boar?
2. If one boar is castrated thus a barrow will the other intact boar still go full aggro on him?
3. Much like two roosters who will eventually give up, when boars fight, will they eventually give up once one is the dominant winner? How often is this too the death?

I appreciate the feedback. We are learning a lot and thinking with the next litter to sell all our male piglets and keep only female piglets for raising on for pork.

Can you get the other boar farther away and out of sight and smell of the older one?
I would say it is the heat cycle getting him riled up,but if the other is castrated it should stop.If your intending on butcher the younger one you should have done this already,they heal much better when done at a young age.As long as the weather is not too hot they should just get tired and give up,but in hot weather they could die from heat exhaustion.No need to take a chance of losing one to fighting,they are vicious animals and anything can happen.

Like people, pigs have different personalities.  I have encountered male who get along with one another. Nevertheless, I keep only one KuneKune boar. It makes life more simple.

I appreciate the reply. We raised the separate smaller boar intact because the previous intact boars we butchered and were littermates of our alpha breeding boar. They did not taste worse nor provoke the same level of aggression.

As far as the other alpha boar being out of sight, he is out of sight but his sense of smell must be spot on right now because he is focused in on this smaller boar and trying to have a go at him. Part of me wonders if the alpha boar should've been kept with this little one all along just so he has someone to fight?

I do agree that I'm going to just raise females for pork now or start castrating and only keep one intact male on the farm from here on out if this dedication to violence is going to be common from our big boar. He is nice enough to us, likes to be petted and be rubbed but with other males a completely different story. Sort of like the Anatolian Shepherd we keep...

Now, my concern is, if this is a heat cycle problem (It's happened for two months now) my sow must not be impregnated. I'm going to have reinforce this fencing now.

Hi Bernie,

I have found that when love is in the air, fences have questionable value.   Sometimes the work. Sometimes they don’t.

You might be on to something with the sow not bred yet,once that happens i guess you will know if the aggression stops.

We had a poorly behaving male pig one time.
Very shortly his name became bacon.