The flaxen haired beauty's unwavering commitment to burning calories is no secret and even an unforgiving schedule of press events won't stop her sweat sessions.
The degree of expression of the trait is highly variable, however: some chestnut horses that do not exhibit much flaxen may nonetheless produce strongly flaxen offspring.
Deep gold palominos may be hard to distinguish from light chestnuts with significant expression of flaxen, but genetic tests can aid determination of color.