Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Due to the low calcium content of meat and meat by-products, nutritional secondary hyperparathyroidism and/or low calcium rickets can be a severe problem in domestic carnivores maintained on diets which are not balanced in calcium:phosporous ratio. This type of diet results in poor mineralization of bones in young animals or excess bone resorption in older animals maintained on an improperly balanced diet.
Kautz, Williams and Hoskins, Johnny
"Low Calcium Rickets in Young Cats,"
Iowa State University Veterinarian: Vol. 37
, Article 3.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol37/iss3/3