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Discussion on Accuracy of measuring the height of ponies
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Moderator:
DrO
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Posted on Wednesday, May 23, 2007 - 9:45 am:
Trying to keep your pony in the pony classes? Here are some helpful hints to be sure he is measured under the ideal conditions of which number one is be sure he is calm when measured. And if you think he is unfairly measured out of his pony classification: have the measurement repeated 3 times.
Vet Rec. 2007 May 19;160(20):691-4.
Some factors affecting the accuracy and variability of measurements of the height of ponies.
Lamas LP, Giovagnoli G, Heath MF, Jeffcott LB.
Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge cb3 0es.
Height is the only factor used to differentiate horses and ponies for com petitive purposes; any horse without shoes that is less than 148 cm at the highest point of the withers can be classified as a pony. However, variations in height associated with anatomical and other factors can occur. In this study the accuracy of the most commonly used measuring procedure and seven independent factors that might affect apparent height were evaluated in skeletally mature horses that were less than 155 cm in height. The results indicated that there was an improvement of 57 per cent in the accuracy of measurement when a second spirit level was added to the traditional measuring stick. The spread of values recorded for a series of repeated measurements by one person was +/-1.06 cm, but the spread increased to +/-1.89 cm when three different people made the measurements. Some variation in height occurred when the position of the pony's head was changed, but none occurred after a period of exercise. There was a reduction in height of 0.84 cm when the animals were allowed to adapt to their surroundings, and there was some reduction after they had been tranquillised.
For more see the article Estimating Weight, Height, and Body Condition Scoring available from the navigation bar at the top of this page.
DrO
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