Realistic plastic bird eggs. Stop Chronic Egg Laying Synchronize hatching Discourage egg eaters. Stop egg laying and prevent stress on your birds. For training foster birds. Measures approximately 1/4 - 1/2 inch in length Chronic egg layer Use: Replace live eggs with artificial eggs. Leave fake eggs in hen's nest until she has no interest in them. Using more eggs will insure quicker results in stopping chronic egg laying.