- Mar 7, 2012
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Thanks for your reply. This is what I had guessed, and experienced as well. The production breeds ( leghorns, sex links, and to an extent hatchery RIRs, Barred Rocks, Orpingtons/Australorps) have all been selectively bred at the hatchery for the most egg yield, which seems to be the stem of the problems. In my experience, and many others on the forum, the incidence of these reproductive problems (EYP, ovarian cancers, oviduct problems, etc) seems to greatly diminish in breeds that do not lay as heavily, as well as in breeds that are purchased from well known, private breeders (vs. hatchery birds).
There is nothing wrong with buying from a hatchery depending on the goals of the chicken keeper, but we can't ignore the correlation between heavy producers sold from hatcheries and the reproductive problems. Not a problem if someone is keeping birds for eggs and/or the pot alone. If someone is seeking long-lived pet chickens, however, it is wise to carefully research the breed and source of the birds. I wish I had been more careful with this myself, in retrospect.
Yes, it seems the incidence of ovarian cancer/repro issues is positively correlated with the number of ovulations, as it is with humans. This is why the white leghorn is *the* model of choice for researchers studying human ovarian cancer.
My gamefowl (from animal shelter) never have reproductive issues. By comparison, they seem indestructible (except for Marek's).