My broody pekin bantam had 11 eggs placed under her 26 days ago, yes 26 days ago. Now we all know the feeling: after 21-23 days if nothing's doing, then usually it's over. However, I left her on the eggs, as they are very expensive Sonnerat's grey jungle fowl x 5 and 6 silver sebright bantam eggs; more in hope than anything else. Just slipped my much pecked hand under her and taken out 5 eggs for the water test. 2 of the 5 eggs wiggled like a wiggle worm. So do not give up on your eggs after 21 days AND ALWAYS PERFORM THE WATER TEST. I've put the above delay down to myself being too ambitious: 11 bantam sized eggs under the bantam is perhaps too many, and I think some have been chilled but not killed due to the broody not being able to cover them properly, hence the delayed development.