In the normal course of events, two yolks appear in approximately 0.1% of eggs laid, or about one in every 1,000. So why are we lately hearing so much about those rare double yolk eggs? And what causes double yolk eggs in the first place? Causes of Double Yolkers A double yolk egg occurs while […]
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An egg’s internal qualities cannot be determined by looking at the outside of the egg. Detecting such things as blood spots, double yolks, hairline cracks, and thin shells requires candling the eggs. Candling means examining the contents of an egg by placing it against a bright light. It’s called candling because the bright light was […]
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The earliest documented instance of a “rooster” laying an egg occurred in Basel, Switzerland, in 1474. The “rooster” was sentenced to death for the “unnatural crime of laying an egg.” A similar event took place, again in Switzerland, in 1730. In the United States, in 1922 a brown Leghorn “rooster” in Madison, Wisconsin, began laying […]
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A chick’s baby feathers are delicate and vulnerable while the bird grows a complete set of adult plumage. Until then, unsightly feather loss in baby chicks may be caused by rubbing or picking. Sequential Molting When a chick reaches the age of three and four weeks, its body feathers grow and fill out. By the […]
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If you would wonder what the word poultry means, you might think first to look in the American Poultry Association’s Standard of Perfection. At the front of the book is a glossary covering 8-pages of terms from “A.O.C.” to “yearling,” but no “poultry.” So, what is poultry? Definitions of Poultry Even though the Standard doesn’t […]
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Chickens that free range may occasionally encounter weeds that are toxic. Even so, most toxic plants don’t taste good, so chickens are rarely tempted to eat them. Besides, birds peck a little here and a little there to get variety in their diet. A bite or two of a toxic leaf or seed will rarely […]
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If your poultry flock experiences a health issue, suddenly all those little details you thought you’d never forget, but now you can’t quite remember, become immensely important. In such an event, you’ll be happy you previously understood the importance of keeping a flock history and took a few moments to write down incidents as they […]
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Until the 1960s, no one was able to determine the function of a chicken’s cloacal bursa. That year, in an attempt to find out, Ohio State University graduate student Bruce Glick performed bursectomies on some chickens. But it didn’t seem to make any perceivable difference. Unintended Consequences Then a fellow graduate student, Timothy Chang, borrowed […]
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Whether or not using more than one incubator makes sense depends on how much hatching you plan to do and how many different chicken breeds or poultry species you wish to hatch. Most incubators for home use are designed for batch hatching. Sometimes, though, you might not want to wait until the eggs hatch before […]
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Most chicken keepers know that a hen will lay eggs whether or not a rooster is present. But a rooster is needed in order to get fertile eggs that will hatch. Less well known is that eggs can hatch without a rooster. Virgin Birth Virgin birth, or parthenogenesis, is the process whereby an unfertilized egg […]
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