A brindle is streaked pattern, too vague to be called a stripe, found on dogs, horses, cattle, wolves, cats, guinea pigs, and moths. Note that these are usually domestic animals. The most prized brindle pattern is orange and black, but brindled animals can also be black, white, and gray.
The brindled animal is ascribed as fairy animal, with the ability to move between worlds. The Book of Taliesin mentions a brindled ox.
I shall not deserve much from those with long shields.
They know not what day, who the causer,
What hour in the serene day Cwy was born.
Who caused that he should not go to the dales of Devwy.
They know not the brindled ox, thick his head-band.
Seven score knobs in his collar.
And when we went with Arthur of anxious memory,
Except seven, none returned from Caer Vandwy.
A brindled cat is more commonly called a tortoiseshell. The First Witch in Shakespeare’s Macbeth declares “Thrice the brinded cat hath mewed,” signifying it is time to begin her magic. (“Brinded” is an older form of brindled.)
The following anecdote, which I shared in Invoking Animal Magic (found in Patrick W. Gainer’s Witches Ghosts and Signs), features a brindled dog.
In the year 1880, in Peach Tree, West Virginia, a large brindled dog appeared that frightened even the meanest dogs. The mean dogs would hide under their houses with their tails between their legs. The brindled dog only appeared at night, never in the daytime. People did not like the dog and began throwing stones to discourage the dog from hanging around. The stones would pass completely through the body. The intervention of the preacher was sought, and he shot the dog five times from five feet away— but each bullet passed through the dog’s body as if it were air. Finally, after three weeks of harassment, the brindled dog went away, never to return.
This incident may or may not have occurred at this time and place. The mention of the year suggests that it really happened, while the “brindle” in the dog supports the idea that this is an old fairy story that came over to the Western Hemisphere from the British Isles. Perhaps both.
Invoking Animal Magic: A guide for the pagan priestess by Hearth Moon Rising. https://www.amazon.com/Invoking-Animal-Magic-Guide-Priestess/dp/1780999291
Raid on the Otherword from the Book of Taliesin https://web.archive.org/web/20080411103302/http://www.maryjones.us/ctexts/t30.html
The Dog Ghost of Peach Tree in Witches Ghosts and Signs by Patrick W. Gainer. https://www.goodreads.com/book/show/1283594.Witches_Ghosts_and_Signs?from_search=true&from_srp=true&qid=OeXkGIXolk&rank=1