Rat Terrier Vs Fox Terrier – Which One Should You Adopt? The Rat terrier has a very short coat and can be black tan, blue, or tricolor. They are usually between 19 and 22 inches in height and weigh between forty and fifty pounds. This breed is ideal for outdoor living and does not do well in cities. For this reason, it is not recommended for apartment living and would prefer a large property. Here are some facts about the Rat terriers and what they are good for. The Rat terrier is closely related to the Fox terrier, but they are two completely different dogs. Although both breeds are members…