No, the Welsh Terrier is not a miniature Airedale Terrier. Though they look similar, the Welshie has been around for centuries longer than the Airedale—and there's a bigger difference between the two than size alone. Welsh Terriers are rambunctious, outgoing terriers with a big dog in a small body complex, while Airedales are often more aloof. Neither breed is known for having a biddable nature, but the Airedale is considered the easier-to-train of the two. Welsh Terriers may be more rambunctious, and rough play is common with the breed. Airedales are playful, but the Welsh Terrier takes play to another level—their high-energy play is often quite rowdy.