Rat Terrier: This breed is known to shed. Its grooming requirements are periodic. Its energy level outdoors is very active. Its energy level indoors is very active. In general, this breed is noted to be tolerant of children. This breed is good with other animals. A fenced yard is not necessary. This breed has no special space requirements. This breeds trainability/obedience is noted as fair. This breeds level of alertness is noted as very alert. This breed should be exercised at least 4 times per day.