I am on day 19, and i ahve four eggs! They all have chicks in them! Two of them are blacked out, but two are not completely formed yet! One of the ones that is not formed yet is not far but is still not complete! The worst one is growing but it doesnt seem like it is quiter ready to hatch yet! I do see life in it when I candle it! Also it only takes up about 3/4 of the egg! Should i be worried??