Hi - I am new to this and wanted some advice please - my appleyard cross runner ducksat on 2 eggs but they both failed to hatch. After candling and deciding they were going off - I broke them open and they were indeed off and the ducklings looked full term to me. I removed the eggs on day 32. Any ideas why they failed to hatch - we did have that very hot weather on days21 onwards - also the shells were extremely hard. All help and advice greatly received.