Ok, starting now get only sexed ducks- but every year get 3 ducks so the old ones as they die off you have shifts of ducks, you'll have (eventually) only between 3-9 too old or too young to lay at all, after all my 7 year olds still give some eggs... you'll then have as few as 9 in declining production or too young to lay and if you -need- about 30 eggs a week you'll need 5-6 ducks in 'condition' this brings your total ducks...
3 young, 6 old, and 6 in condition is only 15 ducks... (or chickens)... after your current group dies out or is re-homed...
So far my ducks are laying more heavily for longer then the chickens, that is the production drop off is later in the ducks I have then it is in the chickens, but the chickens continue to lay every once and awhile even at 7 years- my ducks are too young still to drop off.
3 young, 6 old, and 6 in condition is only 15 ducks... (or chickens)... after your current group dies out or is re-homed...
So far my ducks are laying more heavily for longer then the chickens, that is the production drop off is later in the ducks I have then it is in the chickens, but the chickens continue to lay every once and awhile even at 7 years- my ducks are too young still to drop off.