Tabby is a coat pattern, not a breed. Any cat with an M-shaped mark on the forehead plus stripes, swirls, spots or ticked hairs counts, and the pattern turns up in domestic shorthairs, Maine Coons, Bengals and many others. The four main patterns are mackerel, classic, spotted and ticked, in colors from brown and orange to gray, silver and cream.
Most adoptable tabbies are medium-sized domestic shorthairs, around 6 to 14 pounds, with moderate shedding and a lifespan of 12 to 18 years. Temperament comes from each cat's genetics, upbringing and past experiences, not its stripes, so some are outgoing and others reserved. In Arlington, a short coat is comfortable through the long hot season, and a weekly brushing handles most shedding.