I recently saw an ad for Icelandic hatching eggs for sale. Definitely reasonably priced but if Icelandics are so diverse in color, comb, etc. how can I tell if they are truly Icelandic Chickens?
With Icelandics, more than any other, it is truly "Caveat emptor", let the buyer beware. Icelandics are only truly Icelandic if their gene pool has been kept pure since they left Iceland. You can not breed a crossbred Icelandic back to purity. If you have a Rhode Island Red and cross it with something to gain size or some other trait, you can breed back to other Rhode Island Reds and eventually get a bird that looks like an American Poultry Association Standard Bred Rhode Island Red. They are about type (shape), feather color, leg color, type of comb, size, etc, etc, etc. If it meets the "Standard description" it is a Rhode Island Red. This is not true of Icelandics. They are a landrace breed and do not have set standards. The only thing that makes them Icelandic is their genes. Short of a DNA test, you can't know for sure.....but you can research the person who has them for sale.
Where did they get their stock?
How long have they had them?
Do they have other breeds besides Icelandics?
Are they diligent about keeping them separate so no crossbreeding can occur?
Do they have any history with them that they can share?
If you have doubts, don't.