Supplementary Figure 1. The regression of the cube root of weight (y-axis) on to height at the
withers (x-axis).
Each point represents a breed and the resulting regression line is shown. The regression
residuals (deviations along the y-axis from the regression line) are a measure of breed shape:
positive residuals for breeds that are heavy for their height and negative for breeds that are light
for their height. Several extreme breeds are indicated with triangle symbols and names.