Cosmo (dog) Cosmo (dog) Cosmo is a canine actor. He is a Jack Russell Terrier that is best known for his roles in the movies "Hotel for Dogs" and "Beginners". He was adopted from a breed rescue society by animal trainer Mathilda DeCagny. Cosmo was adopted by dog trainer Mathilda DeCagny from a Jack Russell rescue society in 2007. DeCagny had previously owned and trained other Jack Russell dog actors Moose and his son Enzo, who had played Eddie in "Frasier". DeCagny described Cosmo as being skittish and lacking confidence when she first adopted him, but he was very friendly towards people
Working terrier dog is on the large size, and as a consequence it is most useful in large pipes, artificial earths, or when it has been bred down to a 12–13 inch size. From the southern part of England have come the white fox-working dogs whose origins are the same as those of the Jack Russell Terrier. Kennel Club breeds derived from these mainly-white coated dogs include the Smooth Fox Terrier, the Wire Fox Terrier, the Sealyham Terrier and (most recently), the Parson Russell Terrier and Russell Terrier. None of these Kennel Club breeds are commonly found working in the field today.