A darkening factor

The wild type gene, exhibits itself in more than one way. This calf exhibits how a calf can be born one color and then darken as she ages.

As a newborn she looked like a typical red baldy. Notice however, the black markings on her nose. This calf is E+e and ShS

at about 3 months in age you can already see her darkening. Notice that her nose is nearly completely black now, and you can see darker areas around her tail and neck

and here she is at about 5 months old. She is a much darker red than as a newborn, and you can see even darker areas on her neck, hindquarters and tail.