I only have one duck that lays and she quit once the heat hit also. She was a late starter on top of it (June 23). Now on top of it I sold off "her" drake about 2 weeks ago. She mingles with the rest of the flock during the day but won't sleep with them (she has her own pad) and my young drake is now mating with her. I am hoping with our break in extreme temps she will start in again. I need more baby ducks!