A sheep rescued as a lamb and brought up with a springer spaniel is now convinced he is - a SHEEP DOG. Six-month-old Jack is so sure he is a canine he fetches sticks, wears a collar and a lead, jumps up on his hind legs - and even tries to BARK. Astonishingly, Jack doesn't even recognise his own species and tries to HERD sheep when he is put in the field with the rest of the flock. Owners Alison Sinstadt, 48, and her partner Simon Sherwin, 50, were stunned when the Lleyn sheep was befriended by their nine-year-old springer spaniel Jessie.