The Rideau Arcott is a breed of domestic sheep native to Canada. One of only a few livestock breeds native to the country, the Rideau name is a common one in Ottawa. The latter half of its name is an acronym for the Animal Research Centre in Ottawa where it was developed along with the Canadian Arcott.
One of only a few livestock breeds developed in Canada, the Rideau is a synthesis of many different breeds, but it primarily the product of Finnsheep, Suffolk, East Friesian, Shropshire, and Dorset Horn. The research flock was closed in 1974, and the breed was distributed to shepherds beginning in 1988. The Rideau Arcott today is a maternal breed, with twins and triplets the norm. Crossbreeding with Rideau rams is said to quickly increase lambing rates to 180% or more.
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