The present disclosure relates to methods and systems in egg hatching, based on hatching eggs in a tray (2), comprising arranging eggs in a pattern in or on the tray, comprising egg supporting positions and holes together defining the pattern, wherein the holes are dimensioned to allow chicks (27) after hatching to pass there through into a crate (4), detecting at least one of numbers of unhatched eggs (22) in or on the tray； numbers of dead chicks in the crate； and numbers of objectionable chicks in the crate, and supplementing or removing chicks to or from the crate in correspondence therewith.
