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Kidney stones and osteosclerosis

In rabbits, the kidneys regulate calcium metabolism by retaining or excreting it in the urine. Rabbits absorb calcium efficiently from the gut so if the kidneys are damaged, calcium excretion is impaired so calcium accumulates in the body and is laid down in a variety of tissues, including bone.The bones become very dense so they show clearly on radiographs (osteosclerosis). This is a feature of some rabbits with chronic renal failure. The rabbit in this radiograph has kidney stones. There is also gas in the caecum due to secondary gut stasis and calcification of the trachea and bronchi.

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