The verdict is in: the pigs love it! Probably even more than the Living World Chew-nels. I like this better than the chew-nels because it is less messy. This pigs ate almost all of it, so there was very little to clean up afterwards. I had to leave the guinea pigs alone for 2 days over Thanksgiving and aside from their regular food, hay, and water I left the the chew-nels, this woven grass ball, and timothy hay cubes. The grass ball was half eaten when I got back. The pigs also seemed to have a lot of fun throwing it around. I would definitely recommend this, especially if you need to leave pigs alone for a little while!
Find it here: http://www.petco.com/product/105774/Peters-Woven-Grass-Play-Ball.aspx
or here: http://www.amazon.com/Peters-Woven-Grass-Play-Ball/dp/B0009YJ3OG