Original sentence: "Breed Standards"."What is Their Temperament Like.Like most active and intelligent breeds, Rat Terriers tend to be happier when they receive a great deal of mental stimulation and exercise.Rat Terrier Club of America.Rat Terrier Clug of America.Retrieved August_30, 2007
Edited sentence: Like most active breeds, Rat Terriers tend to be happier when they receive a great deal of mental stimulation and exercise.Many Rat Terrier owners consider crate training to be essential, because it provides the pet and the owner a "safe haven" when either party needs a break.Rat Terrier Club of America Breed Standards