Oh they are gorgeous boys @watermelon1 the one on the right is looking accusingly "are you eating and I;m not"?
Boars are lovely cuddle monsters .
Just make sure they have a lot of room , one of the main causes of boars getting The Strop is being cooped up .
Our first two ( DD had one , DS had the other but I claimed the little boar as DS wasn't a good PiggieDad) were 1yo brothers . They had a shed made into a PigHouse by DH.
They had a huge haybox bed the haybox was 3'x3' made from an old cupboard with the door as the lid and one side open to give a 3' long escape space) we knew they slept in the same box but opposite sides .
Indoors they didn't like their cage but if they each had a cardboard haybox they tolerated it . We ended up buying metal pen sides then C&C grids ,
They had a nasty fight after too much coriander so that was banned and they were ok with parsley (herbs are like crack cocaine to guinea-pigs) .
The bigger boar was very protective he didn't like it if his brother was away from him. When we put them back into the clean Pighouse he stood at the edge of the haybox , did a huge pee , then dived in. A few seconds later , the 2nd boy ran through the pee (urgh) and followed . Much squeaking and purring as they rumbled about 
Always make sure their boxes or hiding spaces have two doors so one cannot trap the other .
Two water bottles is ideal too .
They need space to get out of each others faces .
When the little boar died , we got a baby boar piglet (who grew huge and became the Alpha) . He took the haybox and the older boy had a wicker hedgehog house which the younger one never went into .
Boars will squabble but if you can pre-empt things you can prevent a lot .
When ours got the hump we bathed them , good strong scented shampoo , (Gorgeous Guineas) it puts them in a bad mood with you , makes them smell neutral . We cleaned the Pighouse and moved things about to confuse them ( it isn't hard , they are lovely but not bright . That's part of their charm )