i wonder where the red came from originally? could it be athrowback to a hound, or maybe just a recessive gene.
Jude hart had a brindle brood bioch that threw yellow blk mouth,red blk mouth and brindle blk mouth in the same litter. I had the same too...I've had very few culls out of the real dark red dogs...i don't understand unless its aq hound throwback...