In temperament it is lively, quick-witted and alert, with a terrier's keenness to chase small animals. It tends to attach closely to its own people and can be reserved with strangers.
It is a sleek, compact terrier with a long, wedge-shaped head, small dark almond-shaped eyes and small V-shaped ears that fold forward close to the head. The back arches slightly over the loin, giving a racy outline that hints at its reputed sighthound blood. The short, glossy coat is jet black and rich mahogany tan, with sharply defined markings: tan spots on the cheeks and above the eyes, a black thumb mark on each foreleg and fine black pencil lines along the toes.
The Manchester Terrier's later history was uneven. When the Kennel Club stopped allowing dogs with cropped ears in the show ring in the late nineteenth century, breeders had to work towards a neat natural ear, and the breed lost ground in the process. Its numbers fell further during the twentieth century, and the Royal Kennel Club now lists it among its vulnerable native breeds. Kept to kill rats quickly and cleanly, it was also used for rabbiting, and its speed and agility still reflect that work.