This means that if Pitbulls existed in the wild, expression of a blue brindle coat would be easily obscured by other coat types instead.Р”В«ut of course, they donРІР‚в„ўt. The brindle gene is masked by some genes, but not all.Р”Р„nd the dilute gene is recessive, which means it is only expressed when a dog has two copies of it. The black gene is dominant, which means it is expressed whenever it is present. So that the black appears blue, and the red appears fawn.Р”В«lue brindle Pitbull puppies receive two copies of the d gene: one from each parent. The dilute gene reduces the amount of pigment in each strand of hair. And as handsome as that is, blue brindle dogs have one more extra special element: Pitties with just the black and brindle genes have black and red brindle markings. The brindle gene causes the narrow stripe pattern on blue brindle Pits.Р”В«rindle dogs have one or two copies of the brindle gene (from one or both parents).Р”В«lue brindle Pitbull puppies with only one copy of the brindle gene only develop a brindle coat if they donРІР‚в„ўt inherit an alternative gene which masks it from their other parent. Next comes the brindle gene, which has the unexpected abbreviation K br. It triggers production of the black pigment eumelanin.Р”В«lue brindle dogs only need one copy of this gene, from one of their parents. Sometimes to truly appreciate what makes a color special, itРІР‚в„ўs fun to look at the chemistry going on at a genetic level.Р”В«lue brindle dogs owe their looks to a very particular genetic recipe: The black geneР”В«lue brindle starts, counter intuitively, with the black gene, known as B.Р”Р„ll blue brindle dogs have a copy of the B gene. So, theyРІР‚в„ўre sometimes called blue nose brindle Pitbulls. The exact width and spacing of them is as unique as a fingerprint, but theyРІР‚в„ўre always pretty narrow.Р”В«lue brindle stripes are gray with soft fawn in between them.Р”В«lue brindle Pits also have blue noses.

What About Brindle?Р”В«rindle is a pattern of stripes.

In dog color parlance, blue means gray.Р”В«ut it has to be said that РІР‚ВgrayРІР‚в„ў just doesnРІР‚в„ўt do these coats justice РІР‚вЂњ itРІР‚в„ўs a very special shade of gray indeed. Of course, they arenРІР‚в„ўt literally blue like the sky.

American pitbull terrier blue