My solution was to cut some 2 by 3 boards to use as barriers along the inside edge to keep the bedding pellets in place. I wrapped them in fleece with barrier plastic underneath to keep them from getting soaked with urine and to prevent Sammy from chewing on them. With the plastic sheeting underneath, I can wash them off without getting the wood wet. So far it's working very well. Unfortunately, it prevents the use of the separator with the ramps, but I have a tunnel, a hammock and a fleece forrest that make up for it.
The other problem I solved was the piggies being able to get underneath the fleece and chew the pellets. The wood creates a stiff edge that the canvas bottom lacks. It provides a way to tuck the edges of the fleece to keep it in place better and it also keeps the bedding pellets from getting underneath the wire cage and outside of the fleece bedding. I hope that explains it.
I'll take them outside in a couple of days and without the other two boars and see how they do. If it's still a problem, their outside grazing days are over and I'll bring grass to them inside. I'm in a tough spot if I have to separate them permanently. I'll manage, but it won't be easy.
Mine had a tiff with her stuffed bunny friend one day. She was rolling her treat ball filled with pellets and it bumped up against her stuffed bunny. When the bunny moved, Lacey stepped back surprised, then went over and bit the bunny on the nose. She must have thought the stuffed bunny was going to eat her pellets.
It's set up perfectly with the air pointed away from the cages.
Sammy and Dean are enjoying the fresh air and green grass. I used a divider this time because I didn't want to worry about them fighting. I don't think they would since they don't when they're inside, but I don't want to chance it.
Notice that they're comfortable enough to not have the playpen. The collapsible pen is enough with the board over it to provide shade.
They both are decent sized, while not quite as big as Mr Bubbles. I think that as long as they don't go over 3 lbs, they'll be ok. Their first birthday is coming up on July 10th. I believe they are done growing. I have plans to build a guinea pig playground with tunnels, fleece forests, ramps and little platforms they can hop on. That will help keep them fit and trim. It's just a matter of making the time to get it done.
You can't help but admire Sammy's ingenuity, but I might have to split the veggies into two bowls and see if Dean can get more of his share. As for the hay and pellets, there way more than plenty to go around, so both piggies are getting their share that. It seems like it's just the veggies.
And she knows time of day. 6 p.m. is supper time for us, the dog, and her. She starts whistling at the top of her lungs in case we forget to eat. Anytime the dog is eating, we get a stern look and then the wheeking and pacing start.