4 Funny shells
Various outside factors can affect shell quality. Diet, disease, stress, and even the amount of Vitamin D in the diet – plus that made by the bird when exposed to sunlight – have an effect. There can also be problems with the shell gland (which secretes the hard outer covering) causing various discrepancies to occur.
Wrinkles, flat-sides, sandpaper-like roughness, calcified pimples, body checks and seemingly mended cracks are all fairly common. Thin shells which crumple easily or no shell at all, are also common.
If a hen is roughly handled, stressed, caught or chased when the egg is being formed, you may see wrinkles, crumples and cracks which have solidified. But if you see these types of fault regularly from the same hen, it can be either genetic or she may have a defective shell gland. if you constantly find funny-looking eggs, it may be a genetic issue for a hen.
calcium pimples are more common on the eggs of older hens as their reproductive system isn’t as efficient. It can also be a sign of excess calcium in the diet. Extra calcium should be offered in a separate dish any other feed – don’t force it on the hen by mixing it into her main feed.