The Biro breed began when during the winter of 2004-2005 two puppies from different German breeders were born, both unique in coloration. They were a rich chocolate on a white background and had a golden color throughout their head. Because the breeders liked the coloration so much, they decided to work together and soon began breeding the Biro Yorkshire Terrier. The breed immediately attracted positive attention, which continued to grow. Careful breeding has been adhered to, with the goal of maintaining that attractive coloration. The owners created an acronym of their names, and so Biro was created and registered. While it is too early to tell whether there are any outstanding health problems, they can be compared to their parent breed the Yorkshire Terrier for information. The appeal of the Biro, apart from that delicious chocolate white and gold color, is their size. They can share even the smallest of homes, they adore children, and make great friends of the resident cat or other dogs. The Yorkshire Terrier was bred to hunt small vermin, so that instinct is still there in the Biro. Pet mice that may reside in the home are going to have a hard time with this little hunter; a prospective owner must be aware of the possibilities and the need for vigilance. The appeal of this little dog is size, personality, and appearance, and with more people moving into smaller accommodation, this pup will fit in really well. As a companion to a single or elderly person they are perfect. Like any small dog, they seem to have a larger than life personality and need to be socialized and well trained early in life to overcome any obsessive behavior. As the breed expands its range of habitation, we can expect to see many more of this rare dog.