In temperament the Welsh Terrier is lively, friendly and quick to learn, with a terrier's independence and keenness to dig and chase. It is often described as steadier than many terriers. The Kennedy family kept a Welsh Terrier named Charlie at the White House in the early nineteen-sixties.
It is square and compact, like a smaller Airedale, with a flat, rectangular head, small folded ears and an upright tail. The wiry coat forms a black or grizzle jacket over the back, with tan on the head, legs and underside. Puppies are born almost entirely black, and the tan appears as they grow.
The Welsh Terrier became a recognised breed in the late nineteenth century, when the working terriers of Welsh farms and hunts were first given their own classes at shows. For a time they were shown alongside a similar type called the Old English Black and Tan Wire-haired Terrier, and the two were hard to separate until breeders settled on the Welsh name. The Kennel Club recognised it in the eighteen-eighties. It was bred to run with hounds and go to ground after quarry, sometimes alongside foxhounds and otterhounds, though today it is mainly kept as a companion and show dog.