A commercially available, renal failure diet was used to manage suspected renal failure in a 10-week-old Shetland sheepdog puppy. Rickets subsequently developed, possibly from low phosphorous intake and an increased calcium to phosphorus ratio. Decreased dietary calcium in addition to decreased phosphorus may have played a role in decreasing bone mineral density. Lethargy, decreased long bone growth, angular limb deformity, and osteopenia occurred, but these signs resolved within 3 months with nutritional management.

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