In one test, they injected 500 mg of Collargol into a 23 kg dog. (clspress.com)
About a third of the contents were required for a 4 kg dog. (petsmagazine.com.sg)
For instance, 25g of Swiss cheese provide about 100 kcal, i.e. the third of the daily calorie intake of a 3 - kg dog... While offering sufficient energy density to meet the high requirements of small dogs, the diet must include a moderate quantity of fat. (lowchensaustralia.com)