Fill your donut pans about halfway with corn. One can should be perfect for a 6-donut pan.
Fill the donut pans the rest of the way with water, stopping about 1/4" from the top of the pans, so they don't spill.
Freeze 1-2 hours.
When they're fully frozen, pop the ice donuts out of the pan and serve to chickens.
Video
Notes
This recipe is intended as a treat only, not chicken's primary feed.You can also make these treats with small pieces of fruit, such as blueberries or watermelon pieces, or veggies like diced carrots, shredded lettuce or peas.