The Rambouillet is also called Rambouillet Merino or the French Merino. The development of the Rambouillet breed started in 1786 with Spanish Merinos. Outcrossing with English long-wool breeds and selection produced a well-defined breed with a larger body size and longer wool. This made it a dual purpose breed.
In 1889, the Rambouillet Association was formed in the United States. The objective was to preserve the breed. It has been estimated that 50% of the sheep on the US western ranges are of Rambouillet blood.
Rambouillet rams weigh between 250 and 300 pounds, and ewes range from 150 to 200 pounds . Their faces are free from wool , the lips and nostrils are pink. They can be polled or horned.RAmbouillets are hard and adaptable to different climates and can forage in a variety of conditions. Ewes are great lambers with frew problems. They have a well developed flocking instinct and are easy to handle. A resistance to internal parasites and disease is a plus.
Information from: wikipedia,Oklahoma State University ,and The American Rambouillet Sheep Breeders Association.