The Rideau Arcott sheep breed, known for its prolificacy and growth traits, is well-documented in the Canadian GenOvis program, which tracks key performance metrics for sheep producers. Below is a summary of average data for lambing rates, weaning weights, and time to market weight based on GenOvis records.

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Average Number of Lambs per Ewe

• Per Lambing: Rideau Arcott ewes produce an average of 2.33 lambs born and 1.90 lambs weaned per lambing event.

• Annual Productivity: With approximately 1.10 lambings per year, ewes yield about 2.56 lambs born and 2.09 lambs weaned annually.

• High-Performing Flock (2019–2020): One evaluated flock reported 2.38 lambs born and 2.24 lambs weaned per lambing, achieving a total of 59.1 kg (130.29 lbs.) of lambs raised to 50 days per ewe.

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Weaning Weights

Weaning weights, typically measured at 50 days in GenOvis.

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• Average Adjusted 50-Day Weight: Lambs average 22.5–23.2 kg (49.6–51.1 lbs.) at 50 days.

• High-Performing Flock (2019–2020): Total weaned weight per ewe at 50 days was 59.1 kg (130 lbs.), suggesting approximately 26.4 kg (58.2 lbs.) per lamb when divided by the average of 2.24 lambs weaned per lambing.

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Market Weights

Market weights, typically measured at 100 days in GenOvis.

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• Average adjusted weight: 37.6–38.9 kg (82.9–85.8 lbs.) per lamb at 100 days.

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