Katahdins are docile so are easily handled. They exhibit moderate flocking instinct.
Live weight of a mature ewe in good condition usually ranges from 120 to 160 pounds; a mature ram will weigh 180 to 250 pounds. Average birth weight of twins is about 8 pounds.
Ewes and rams exhibit early puberty and generally have a long productive life. Mature ewes usually have twins, occasionally producing triplets or quadruplets. A well-managed and selected flock should produce a 200% lamb crop. Rams are aggressive breeders, generally fertile year round, and can settle a large number of ewes in the first cycle of exposure. With selection a flock can consistently lamb throughout the year. The Katahdin ewe shows a strong, protective mothering instinct, usually lambs without assistance, and has ample milk for her lambs