The Coopworth breed had its origins in the 1950's and 1060's in the crossing of the Romney ewe with the Border Leicester ram to produce the F1 Border-Romney and the subsequent inter-breeding of them to give F2 and F3 generation progeny, which were then eligible to be known and registered as Coopworths.

Since the 1970's the base of the Coopworth breed has been widened to include sheep bred from white faced breeds other than the Romney, by continued top crossing with Coopworth rams.

For more information on the history of the Coopworth breed click on Origins - detail.