how about the fat tho?
https://theconversation.com/how-do-you-weigh-a-dinosaur-there-are-two-ways-and-it-turns-out-theyre-both-right-144874 said:
So how do you “weigh” a dinosaur? There are two approaches. One option is to reconstruct what the animal might have looked like, including how big it may have been, and then estimate the total weight of its bones, muscles and other tissues. This approach incorporates as much anatomical data as can be recovered from the fossil record, but our confidence in this method depends on how complete a fossil we are looking at.
As a result, animals such as the famous Tyrannosaurus rex, whose fossil record has been collected for more than century, require much less guesswork to reconstruct than many of Australia’s dinosaurs, which are often based on a few bones. In either case, reconstructing a long-extinct fossil inevitably requires some assumptions.
The second approach is to measure certain key bone parameters, such as the circumferences of the humerus and femur, and insert these measurements into scaling equations derived from animals alive today. This method offers a simple description of the possible body masses a set of limbs could theoretically carry. But, because it is based on a few measurements, it can be imprecise, especially for the largest dinosaurs.
Limb scaling equations also assume that limb size and body mass scale the same way in dinosaurs as in modern animals. Limb circumferences have been shown to consistently predict body mass in very different types of living land animals, include primates, marsupials, and turtles. This suggests they can provide an external measure of accuracy for the more precise estimates obtained from reconstructions.
As a result, animals such as the famous Tyrannosaurus rex, whose fossil record has been collected for more than century, require much less guesswork to reconstruct than many of Australia’s dinosaurs, which are often based on a few bones. In either case, reconstructing a long-extinct fossil inevitably requires some assumptions.
The second approach is to measure certain key bone parameters, such as the circumferences of the humerus and femur, and insert these measurements into scaling equations derived from animals alive today. This method offers a simple description of the possible body masses a set of limbs could theoretically carry. But, because it is based on a few measurements, it can be imprecise, especially for the largest dinosaurs.
Limb scaling equations also assume that limb size and body mass scale the same way in dinosaurs as in modern animals. Limb circumferences have been shown to consistently predict body mass in very different types of living land animals, include primates, marsupials, and turtles. This suggests they can provide an external measure of accuracy for the more precise estimates obtained from reconstructions.