Note – There are multiple uses of these terms. We in KHSI use definition 1 in each case. But put in the second
definition to note other common uses. Many breeders use Registered, Purebred and Fullblood
interchangeably. Others distinguish between a Registered and a fullblood.
Commercial – A sheep that is not registered. A commercial Katahdin usually refers to a sheep that is of 100%
Katahdin ancestry but is not registered. A second definition includes sheep that are either unregistered
Katahdins or crossbred Katahdin.
Registered – A Registered Katahdin is listed in the KHSI flock book as 100% Katahdin. Registered sheep of
other breeds are listed as 100% in their flock books. The KHSI Certificate of Registration is white.
Recorded – A Recorded Katahdin is an animal that is listed as a percentage animal by the KHSI Registry &
Flock Book. Note: A Recorded Katahdin may have all Katahdin ancestry, but if a grand-dam or dam is
not Registered it is cannot be registered as a 100% Katahdin. It may be Recorded with the KHSI
Registry. Or a Recorded Katahdin may be the offspring of a Registered Katahdin and a Registered
Suffolk and be Recorded at 50% Katahdin. The KHSI Certificate of Recordation is blue. The
percentage according to the KHSI Registry is listed on the Certificate.
Grade – Used in two manners. Some use this to designate a commercial Katahdin that is not Registered.
Others use it to designate a crossbred Katahdin.
Crossbred – Has parents of two or more breeds. Typically, animals that are 7/8 or greater blood of one breed are
not considered crossbred, but of that breed. Some breeds of livestock designate animals with less than
15/16 or 31/32 are crossbred.
Purebred – Used in two manners. KHSI will use the 1st definition. 1) Designates an animal that is of one breed.
2) Some Breed Registries and breeders reserve the “purebred’ designation for only those animals that
are Registered and 100%.
Full-blood – Used in two manners. KHSI will use the 1st definition. 1) Designates an animal that is of one
breed. 2) Some Breed Registries and breeders reserve the “full-blood” designation for only those
animals that are Registered and 100%.
Percentage – Used in two manners. A percentage Katahdin may refer to either 1) a Katahdin that is grading up
to 100% in the KHSI Registry or 2) a cross-bred Katahdin that may be in a grading-up program.
“Up-grading” versus “grading up” – Up-grading will be used in this document to indicate that the breeding
goal is to bringing in genetics from another breed or composite to improve a genetic parameter in their
Katahdin flock or the breed. A breeder who used highly parasite resistant Florida Native ram on his/her
Katahdins and then selected only those offspring with superior parasite resistance to record and
eventually register is “up-grading”. A breeder who starts with a flock of commercial Katahdins or
registered/commercial ewes of another breed and sequentially breeds them and their offspring to
Registered Katahdin rams and eventually registering the 7/8 (87.5%) offspring is grading up.