Nest box

Built a new nest box this weekend out of a scrap peice of plywood.Put old carpet pad in the bottom for a liner,going to put wood chips in also. Not having any luck with my duck eggs hatching, so far they haven't been fertile. I made their pond a little deeper maybe that will help. Any advice anybody has will be appreciated. Our blue swede duck started laying too, her eggs are not as big as our pekin's. Maybe some of hers will be fertile. Our easter egg pullets should start laying any day now, can't wait to see what color they are!! Kitty our handicapped brown leghorn should too, don't know if it will take a little longer because of her deformities or not. If she's real hungry she'll fly up on your shoulder. I still have to feed her seperate from the others, she can only eat mash and it's got to be deep.