Sounds like you are doing well by them, so it may be one of those strange things, like perhaps a very low level of parasite infestation, or something in the water (look for iamcuriositycat's situation with ducks not laying).
You could try changing their feed to another kind of layer feed. How about the chickens? Laying okay?
Have you tried giving them poultry vitamins with electrolytes and probiotics? Have you tried a little apple cider vinegar in their water?
You could try changing their feed to another kind of layer feed. How about the chickens? Laying okay?
Have you tried giving them poultry vitamins with electrolytes and probiotics? Have you tried a little apple cider vinegar in their water?