A recent case report published by VitDAL highlighted the metabolic complications which can arise if dogs are fed a diet deficient in vitamin D. The dog presented with a very low ionised calcium and subsequent analysis by the VitDAL indicated that the serum had very low concentrations of 25(OH)D. As shown in the CT image, the dog had very poor skeletal mineralisation due to the low concentrations of calcium and vitamin D. The case was a powerful reminder of the importance of feeding dogs a vitamin D replete diet since the inability of dogs to produce vitamin D cutaneously (see our follow up study) means that they are heavily reliant on dietary sources of vitamin D. The paper can be accessed at the following link.