I put antibiotic cream on it, cover with gauze & separate them for a little while. The next morning, the area looks like it is starting to heal.
The rest of the time, they seem to get along fine. Is it time to permanently separate them? The cage is huge - don´t know where I´d put another.
What size is your cage eichstermom? Space seems to be a recurring issue with fighting pigs. The bigger the better. Mine is 28" x 70" for 3 boys.
Also, it helps if each pig has their own house (box or pigloo within the cage) so they have their own territory. You will also want to provide them each with their own water bottle and food dish. Just reduce the things they can fight over.
I thought I was doing my 3 pigs a favor by putting one big house in their cage so if they were lonely or scared, they could huddle in there together. BIG mistake. They always fought over the big house. I finally removed it and put 3 houses exactly the same size. It has made a huge difference - no more squabbles.
A ´´huge´´ cage according to specific standard may be a small one according to another set of standards. Take a look at http://www.cavycages.com and check their cage size recommendations.
I have two sows in a 2x6 C&C cage (roughly 21´´ x 72´´) with a second level for added area, and sometimes it seems that they would benefit from a larger cage. Two food bowls, two water bottles, and three hidey holes for them to choose from. Never a fight between them.
Anyhow, there are several reasons for a change of behavior among gps. I´m sure other, more experienced people in this boad will provide you with valuable information.