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Urinary Calculi is the formation of crystals or stones in the urinary tract which block the elimination of urine from the body.(These are commonly referred to as Kidney Stones in humans.) Most often these crystals are formed due to a metabolic imbalance in the body caused by feeding too much grain to bucks and wethers.rinary Calculi is the formation of crystals or stones in the urinary tract which block the elimination of urine from the body.
Kidney stones, also called renal calculi, are solid pieces of material that form in the kidneys from substances in the urine. Stones can occur in any part of the urinary system from the kidneys to the bladder. They may be small or large. You may have just one stone or many. There are several types of kidney stones, but most stones are calcium stones.