there is some infection that causes that.............ooohhhhh.....i cant remember the name.........someone is sure to hop on here and tell you..in the meantime ill go look. ok i found this...
Egg Problems
An occasional misshapen egg is no cause for concern, but a hen that typically lays odd-shaped eggs will pass the trait on to her progeny.
Bloody shells sometimes appear when pullets start laying before their bodies are ready, causing tissue to tear. Other reasons for blood on shells include excess protein in the lay ration and coccidiosis, a disease that causes intestinal bleeding. Cocci does not often infect mature birds, but if it does you'll likely find bloody droppings as well as bloody shells.
Chalky or glassy shells occasionally appear due to a malfunction of the hen's shell-making process. Such an egg is less porous than a normal egg and will not hatch, but is perfectly safe to eat.
Odd-shaped or wrinkled eggs may be laid if a hen has been handled roughly or if for some reason her ovary releases two yolks within a few hours of each other, causing them to move through the oviduct close together. The second egg will have a thin, wrinkled shell that's flat toward the pointed end. If it bumps against the first egg, the shell may crack and mend back together before the egg is laid, causing a wrinkle.
Weird-looking eggs may be laid by old hens or by maturing pullets that have been vaccinated for a respiratory disease. They may also result from a disease itself, such as infectious bronchitis. Occasional variations in shape, which can be seasonal, are normal. Since egg shape is inherited, expect to see family similarities. If you do your own hatching, select hatching eggs only of normal shape and size.
Thin shells may cover a pullet's first few eggs or the eggs of a hen that's getting on in age. In a pullet, thin shells occur because the pullet isn't yet fully geared up for egg production. In an old biddy, the same amount of shell material that once covered a small egg must now cover the larger egg laid by the older hen, stretching the shell into a thinner layer.
This flat-sided turkey egg appeared after the hen crash landed off the barn roof.
Shells are generally thicker and stronger in winter but thinner in warm weather, when hens pant. Panting cools a bird by evaporating body water, which in turn reduces carbon dioxide in the body, upsetting the bird's pH balance and causing a reduction in calcium mobilization. The result is eggs that are thin-shelled. Thin shells also may be due to a hereditary defect, imbalanced rations (too little calcium or too much phosphorus), or some diseasethe most likely culprit being infectious bronchitis.
Soft or missing shells occur when a hen's shell-forming mechanism malfunctions or for some reason one of her eggs is rushed through and laid prematurely. Since the shell forms just before an egg is laid, stress induced by fright or excitement can cause a hen to expel an egg before the shell is finished. A nutritional deficiency, especially of vitamin D or calcium, can cause soft shells. A laying hen's calcium needs are increased by age and by warm weather (when hens eat less and therefore get less calcium from their rations). Appropriate nutritional supplements include free-choice limestone or ground oyster shell, and vitamin AD&E powder added to drinking water three times a week.
Soft shells that are laid when production peaks in spring, and the occasional soft or missing shell, are nothing to worry about. If they persist, however, they may be a sign of serious disease, especially infectious bronchitis, Newcastle disease or infectious laryngotracheitis, all of which are accompanied by a drop in production.
Broken shells often result when a thin or soft shell becomes damaged after the egg is laid. Even sound eggs may get broken in a nest that's so low to the ground the chickens are attracted to scratch or peck in them. Hens and cocks may deliberately break and eat eggs if they are bored or inadequately fed. Boredom may result from crowding or from rations that allow chickens to satisfy their nutritional needs too quickly, leaving them with nothing to do.
A chalky egg (right) occasionally appears as a quality control glitch in a hen's reproductive system
