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How to Calculate Sheep or Goat Weight

Sheep diagram.

Unless you are a commercial sheep farmer, you probably do not own a livestock scale to weigh your sheep, goats, lambs or kids. Figuring out how to weigh a sheep or a goat is easy if you can measure the animal's body length and girth. Use this guide to determine the weight of your livestock sheep or goat:

  1. Measure the circumference of the animal, as shown in distance C in the illustration. Make sure to measure girth in relation to the location of the animal's heart. On a sheep, ensure an accurate measurement by compressing the sheep's wool so that the circumference reflects that of the body and does not include that of the body plus the wool.
  2. Measure the length of the animal's body, as shown in distance A-B in the illustration.
  3. Using the measurements from steps 1 and 2, calculate body weight using the formula HEART GIRTH x HEART GIRTH x BODY LENGTH / 300 = ANIMAL WEIGHT IN POUNDS. For example, if a sheep has a heart girth equal to 35 inches and a body length equal to 30 inches, the calculation would be (35 x 35 x 30) / 300 = 122 lbs.

 

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