Little info from Coal Miner Gamefowl website: “I received these Mugs from Ray McDonald of Clanton, Alabama, in 1980 and Mr. McDonald got them from Dehner Racey of Springfield, Missouri, in 1960.

When Mr. Racey bred them they came black, blue, and brown red in color. We do not breed for color so they still come black red, brown red, blue, and some solid black. Regardless of color, though, they're all the same breed and the only difference between the different colors is solely appearance.

Also, in Mugs, blue does not breed true. It is only a shade between blue and non-blue and if blue is bred to blue then a lot of white splash blue offspring will be produced.

Mugs are mostly medium to medium-high station, with very good plumage. Some will have black coloration in their face.

They generally have a gentle disposition.

When cockfighting was legal, these fowl were shown in several states and a few other countries having fought in American, Filipino, and Mexican shows.”

- Richard Kelly @https://www.coalminermugs.com/mug.html