hey there i have found that my moter goose has wandered off her eggs today so ive scooped them up an am incubating then under heat.... 1st time ive done this but in unaware of what im looking for i have only got two of them left........

one has a small air pocket in it and the other has not ive candel it but has not shown any air in there at all just a big black mass and is smelling quite rough too. im aware thet the eggs have been under my goose for 21 to 25 days so do i have 1 fertile and one rotten please any one i need some help!!!!!