Figures provided by the National Research Council in it's latest book published in 2006. Each Measurement listed is amount needed per kg. of body weight unless otherwise indicated.
According to the National Research Council, dogs naturally eat between four and eight meals per day.
The lowest calculations for caloric intake, for sedentary dogs, is recommended at 95 Kcal per K of body weight.
A summary of the book can be found at the National Acadamy Press site under "download free".