Neutering boars won;t make them any less liable to fight . It wotks with just about any other male animal but with piggies it won't change their temper .
It makes them safe to pair with sows and lessens their risk of impaction. Many rescues will castrate boars (even a pair) so if one dies you can get sows for your lone boar without waiting the 6 weeks sterile time .
There's a risk and a cost too .(about £60ish)
Boar pairs are a very artificial pairing , given the choice they'd like a hareem of sows
to think they're in charge of . My two boars who did have wives were spectacularly under the thumb .
If you put boars together then two is company three's a crowd.
They do need a lot of space .
Our first bonded boys had a playhouse with a big haybox (House was 6'6" x 6'6" and the haybox was 3' x3') They both slept in their but opposite corners - you could tell by the pooh .
If they wanted they slept in the same box . we gave them a few cardboard boxes , you need 2 doors so one pig cannot trap the other .
The first winter we had them in at night in a 4x2 which we had to divide . This was just to sleep in they went to their Pighouse (all prepped with clean hay and a little heater ) and were happy .
Then we thought give them a box of hay each , no divide and if they get the hump put a cover over so they know It's Night Time .
They seems settled with this , their own space but could meet up .
When we bonded GP1 with Piglet GP3 (after GP2 died) we got a pen for them for winter nights in the small bedroom . GP 3 grew huge (Rex) and quickly decided he was Alpha , GP1 was quite laid back with this .
In the Pighouse GP3 had the haybox and GP1 had a hedgehog house that he was happy to retire to .
C&C are a really good option for space and adaptability . I bought some 14" grids from Costco , secured with cable ties . They had clips but I couldn't fathom them. We di single storey (mine weren't into climbing )
You can re-arrange the space , change the boxes round to keep them interested . Tunnels are good too .
My DH wasn't wild about the pigs but he dutifully sorted out the Playhouse to make it safe , lights , secure , removable windows with protective lining for ventilation.
He'd buy them veg on the way home and leave a lawn patch for their run.
I ended up with 5 at one point too
.
When we got the first two boars (my DD wanted a male) then went on to add the piglet after one died . We didn't want to put a male with GP3 (he weighed 1.4kg!) so got him snipped and two feisty wives .
When he died , we gt the lovely GP6 for them, then another two sows later...but the new ones wouldn't join the herd .
So we had a 3+2 for a while .
Boars are lovely cuddly soppy articles but you need to respect their need for space , expect and anticipate any spats .
What worked for ours was a bath (smell the same , get them in a bad mood with us ) complete deep clean of their bedding and move things . They then ponder What The Heck went on here !