Developed in 1912, in part by the USDA, Columbia sheep are wonderfully versatile. A cross between Lincoln rams and Rambouillet ewes, they blended the best traits of both breeds. Being one of the larger breeds of sheep they produce big, hardy, and fast growing lambs. Because of this they are increasingly being sought as terminal sires. That being said they are truly a dual purpose breed: Columbia ewes typically produce a 10 to 16 pound medium wool fleece with a Bradford count between 50s-60s. Though not a fine wool, I personally prefer Columbia fleeces because of their longer staple length, light shrinkage, and beautiful luster.