Spider veins are a group of dilated veins that appear close to the surface of the skin and look like spider webs or tree branches. They are usually red or blue. Although they can develop anywhere, they are most common on the legs and face.
Toy dogs constitute the smallest variant, with a height of 8 inches and weight range of 4 to 6 pounds. A short- and smooth-haired dog, the Rat Terrier has a coat that can sport any of a variety of colors, which include white, red, fawn, black and tan, lemon, brown, blue and white, and red brindle.
There are also miniature Rat Terriers that stand under 13 inches and larger Rat Terriers that weigh more than 25 pounds. Most kennel clubs recognize both standard and miniature size divisions, but recognition of the giant Rat Terriers varies by individual club.