Quote: You might consider what they are eating. How long have you had them in relation to your other birds that are hatching egg just fine? Are both groups of breeding stock feed the same feed?? Is the soil different in each of the areas they run? My oint is that there are many reasons, especially nutrition and incuation, as to why they don't hatch. Nutrition is a biggy. Hving enough oxygen enter the incubator is extremely important as well.
ANyways . . just more to think about. . . .. HOpe you find the answer.