There are some clues, at least, there were with my runners.
First, Storey's Guide said that smaller breeds can start laying as early as sixteen weeks.
At about twelve weeks, the girls (no drakes) started acting out breeding behaviors - so I took a guess that this was the beginning of their systems maturing. I started setting out oyster shell free choice at that time, since the recommendation was to start o.s. about a month before they start to lay (I asked myself, "so how do I know ahead of time?"). I think it was a good guess. At 16 weeks, 4 days someone laid her first egg, and it took another six weeks for everyone else to begin.
In other areas of behavior, it is obvious the ducks have not read the books. Cold tolerance, dark tolerance, reputation for being high strung, nothing like what the books say.
First, Storey's Guide said that smaller breeds can start laying as early as sixteen weeks.
At about twelve weeks, the girls (no drakes) started acting out breeding behaviors - so I took a guess that this was the beginning of their systems maturing. I started setting out oyster shell free choice at that time, since the recommendation was to start o.s. about a month before they start to lay (I asked myself, "so how do I know ahead of time?"). I think it was a good guess. At 16 weeks, 4 days someone laid her first egg, and it took another six weeks for everyone else to begin.
In other areas of behavior, it is obvious the ducks have not read the books. Cold tolerance, dark tolerance, reputation for being high strung, nothing like what the books say.