Experts said a 4.1 ounce egg laid by an Iowa chicken is unusual, but not without precedent.

Nathan Batten said Aussie, a black Australorp chicken, laid the egg measuring 3.5 inches long and 6.5 inches in circumference at his farm near Bonaparte. The egg weighs about twice as much as an egg labelled large by U.S. Department of Agriculture standards and exceeds the average 2 1/2 ounces for a jumbo egg.

Sean Skeehan, who raises chickens at Blue Gate Farm in Chariton, said egg size is dictated by breed, not by diet. He said the huge egg was not surprising given previous 3-ounce eggs laid by Aussie. Hongwei Xin, director of Iowa State University's egg industry centre, said he heard of two similarly sized eggs at a farm near Winterset last year.

Batten said he is planning to contact Guinness World Records to determine whether the egg was a record-setter. On its web site, Guinness makes no mention of largest egg laid by a chicken. It lists a more than 5-pound ostrich egg as the biggest egg laid by a bird.

I'll have a dozen of those please!

That explains it...

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