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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.
Overview. Kidney stones are also known as calculi (plural), or calculus (singular). When it is in the kidney, it is a renal calculus. The tube draining the kidney to the bladder is the ureter, and a stone in the ureter is a ureteral calculus. It is estimated that 20% of us will have a kidney stone in our lifetime.