I feed my flock 3 loaves of scratch bread from the bread store "Scratch" Bags daily in the morning. They love it. I have had no health issues, their eggs are strong, yolks orange and rich, and you must remember bread is vitamin forteified. It has extra calcium, b and d vitamins, as in humans we must have vitamin D to absorb our calcium, as do our avian children. Just remember bread has little protien and I am giving the loaves to a flock of 40 hens, 5 roos, and 5 turkeys. It is good for a small boost in vitamins and minerals, a little protien, and a lot of love for a treat from your birds. If we have a good egg day I throw in 2 extra loaves as a thank you treat. I did harvest a turkey today and I was amazed at how his heart and liver were so meaty and absent of fat, since I feed them bread, and in his crop I pulled out oyster shell, granite grit, corn, layer feed pellets, and BREAD. He was undressed at 43 pounds, and dressed at 36.