This Hay Ball Feeder provides a more proactive approach in feeding your rabbits, hamsters, and guineas. This one is a round wire ball that you fill with hay or fresh grass. It’s a feeding accessory that gives your pet a bit of a challenge in feeding because they’ll have to pull the grass to get it out of the ball. This feeding method is better because it prevents a feeding frenzy as well as overfeeding and leftovers.