My 18 week old Pekin duck has just started nesting and laying an egg every morning. The egg is always rubbery looking, broken and full of ants by the time I find it. Is something she is/or is not getting causing this? How long do they sit on their eggs daily? It's very hot and she likes to hang with her "hubby" in the pools the rest of the day. New to duck raising and I would love for them to have babies but not sure what the process is. Thank you for any reply