This is a continuation of a seven-part series that we started during the World Cock fighters Day.
Dominant vs. Recessive. Dominant traits always overpower the recessive traits when they stand up to each other. The dominant trait will surely show up in the offspring while a recessive trait will only show up in the offspring when both the cock and the hen carry the same recessive trait. The more inbred a bird is, the more you will see the recessive traits that this particular family has hidden in them.
Fertility. When a cock and a hen are bred, the cock’s sperm travels to the oviduct, its mission is to fertilize the egg. If the hen has laid an egg shortly before the breeding has taken place, most likely this breeding will be successful. The average duration of fertility is about ten days. However, if you switch cocks, the new cock rather than the old one will most likely fertilize the egg. It is for this reason that breeders like to wait until the sixth egg has been laid before collecting eggs from the new cock. To be sure that the eggs are fertilized by the new cock, you might want to wait at least two weeks before you start to collect them for hatching. Possible reasons for a lower fertility rate include: 1) weather that may be too warm; 2) breeders are getting less than 14 hours of daylight (for the cock as well as the hen); 3) brood fowl are infested with internal and external parasites (such as worms, lice and mites); 4) brood fowl may be suffering from some sort of disease – especially troublesome are the chronic respiratory disease, infectious coryza, infectious bronchitis, etc.; 5) breeders are undernourished, where their feed mixture or protein level may be wrong; and 6) using breeders that are too young or too old.