Feeding Dane puppies requires a diet with low calcium levels, minimal added supplements and a calcium / phosphorus ratio as close to 1 / 1 as possible. (feedingmydogbreed.com)
This occurs because one of the effects of T3 and T4 is to lower calcium levels in the tissues and blood. (myersdetox.com)
It is not caused from a fever, but rather it is caused by low calcium levels, usually brought on by nursing. (all-about-goldens.com)