Cage biting

[ogolble]

I have 4 males, 2 in each cage, and just recently, one from each cage have been biting at the cage trying to get at each other. I have these 2 pigs for 7 months so they aren't new to each other. The grey piggie has been more aggressive to his cage mate too, fighting for dominance. Any ideas?

 

[pinky]

I'd either move the cages farther apart or make a double decker where they can't see each other.

 

[bpatters]

Plexiglass inside the walls will work also.