40 days that would put me out of business. All the books I read from the old poultry teachers say about ten days. The hen has a clutch of egg yolks maybe three six eight what ever. The sperm fertilizes the clutch and that it till the next clutch shows up. If the male is out for ten days or two weeks you save the eggs for that male. Then if they don't hatch and are clear no harm done. Put next male in and when he breeds the female that clutch should be his.
That's how I understand it. Did you learn that on back yard chickens tread? Got to watch some of this stuff they are extremist in thinking. Get back to the basics of raising a chicken. Like Grand Ma use to do. Some of these people don't know what the heck they are talking about and people are mislead. Its like that any way in this go to the back woods live off the land kick. Study the folks who have done it for years the masters. People who have been doing it for twenty to forty years and when they go to a poultry show they kick butt. I would pump their brains out on how they did it. Then do what they did and you will have success. KISS
I Question what I read in old books as well as what I am told. 10 days is too short and 40 days is usually too long.
There is a sperm storage structure in the oviduct of the hen. I found an educational institution study that said:
In order to fertilize a nearly daily succession of
ova, which amounts to 2 to 7 eggs per week,
sperm are slowly but continuously released from
the oviductal sperm storage sites in the caudal
end of the oviduct and are transported to the site
of fertilization at the cranial end of the oviduct.
The precise mechanisms which regulate these
complex processes remain to be elucidated. How-
ever, since the 1980s we have begun to better un-
derstand the mechanisms which regulate sperm
storage and selection in the avian oviduct (see
Bakst et al., ’94).
The full article is here: Structure of Avian Oviduct with emphasis on Sperm Storage
The article does not say how long sperm lives in the storage system. I know from experience that 14 days is not enough. I hatched a mix of SG Dorkings crossed with Ameraucanas where the Cock Bird was separated for 14 days. Beautiful Mongrels but not the Pure SG Dorkings I was supposed to hatch.