I wanted to warn others about the dangers of using the long metal feeders. I was using a new metal feeder, the kind with the holes in it, for a mixed batch of chicks and ducklings. Then one day I discovered a little duckling that had cut its beak completely off, top and bottom. At first I couldn't figure out what happened to the poor little guy (I had to put him down, he had no beak left at all, top or bottom) and thought someone must have picked on him. Then the next day another duckling had cut half of its top beak off (he is still alive and well and the biggest of the freeranging bunch now.) That's when I realized the only thing it could have been was the metal feeder. Sure enough, after feeling inside the rounded slots, which are smooth on outside, I could feel the sharp edges on the inside. The chicks in the same brooder didn't have a problem with the inside edge being sharp becuause they peck at the food and have a different type of beak. But the ducks, with their always wet beaks/bills which are also larger, were scraping them on the inside edge of the holes in the feeder and getting their beaks cut off. So I switched feeders. Just recently, I was using the same feeder in a brooder pen with chicks that are about 3 weeks old. They were aggressively going at the food and one ended up with a scraped head and one a scraped neck. Needless to say, I've tossed that feeder out and won't use it anymore and caution everyone against them.