Eggshell Quality in Layers: 7 Checks Before You Change Feed
Eggshell quality in layers depends on calcium, but not only on how much calcium is in the bag. Check when the hens eat it, how coarse the limestone is, what kind of limestone it is, and whether water, heat or disease is cutting intake. Fix those first, then talk to your feed mill. What does eggshell quality in layers really mean? Heat stress is a common reason for thin shells in Punjab summers. A good shell is thick enough to survive the belt, the tray and the road to the market. A weak shell shows up as thin, rough, soft or cracked eggs, and every cracked egg is money lost. The shell is mostly calcium carbonate, and a hen builds a new one almost every day, so even a small gap in daily calcium shows up fast. The University of Florida's poultry extension notes that a pullet's calcium need rises at least four times when the first eggs appear, almost all of it for the shell. You can read it in their fact sheet, Factors Affecting Egg Production in Backyard Chicken Flocks . The ...