The Physiology Of The Racing Greyhound states that most species have about a 40% muscle mass to body mass ratio. Understanding Body Composition puts "optimal fitness" in humans at 16-25% body fat for women and 12-18% in men. These add up to pretty much anywhere from 50% to 65%, leaving 35-50% as more or less unaccounted for. In looking, I have been unable to readily locate any further breakdown, let alone any source that provides a full breakdown. At least Wikipedia is lacking in specifics in this regard.
In adult, healthy mammals, what is a common body mass breakdown into muscle tissue, fat, bone, and internal organs, by percentage of total body mass?
I am particularly interested in wild carnivores, but almost any mammalian species will do in a pinch. Specific examples and citations are appreciated.