The original Yorkshire Terrier, known as the «Broken - Haired Scotch Terrier» was a 12 - to - 14 pound dog with wire hair whose intended purpose was the catching of rats and other vermin that lived in small spaces. (sheppardsoftware.com)
Certain breeds, including Beagles, Scottish Terriers, Shetland Sheepdogs, West Highland White Terriers, and Wire Hair Fox Terriers are more susceptible due to a genetic predisposition to bladder cancer. (thinkaboutnow.com)