Dominance: Are they reintroduce or are they just forget each other?

[fridzalone]

My three boars used to live together. Dumboom is the dominant one, while Pixie is the least dominant. I bought three of them altogether, and since the first day, even Dumboom is the dominant, but he doesn't mind sharing with the others.

About 1 month ago, I recognized that three of them infected by fungus and I had to separate and quarantine all of them. Two days ago, Dumboom and Pixie recovered, and I put them back together in their home. That's when it all started, Dumboom started acted strangely, he guards everything in the cage (hay, and the water bottle). Whenever Pixie get near to the hay or the water bottle, he chase him. They already have 2 for everything, two hay racks, two water bottles.

I'm afraid Pixie stressed (he already look stressed now). I ever lap Dumboom after he chase Pixie (just to make sure Pixie had chances to eat his hay, veggie and drink the water). And Pixie popcorning like crazy, he seems happier if Dumboom is not around. What should I do now?