A lonely piglet is driving her new owners barking mad after convincing herself she is a dog.Four-month-old Coco was given to the St Francis Animal Welfare Shelter in Fair Oak, Hampshire, by a family who could no longer care for her.Since then the pint-sized piglet has become best friends with German Shepherd Jay.So much so that the youngster is apparently convinced she is a dog - even going for walks on a lead, fetching sticks and guarding the other pooches.Centre manager Sueltan Day said: "It is funny to see her and the other dogs together. I genuinely think she believes she is a dog as she copies what they do."One of our dogs, a German Shepherd called Jay, has taken her under her paw so to say and protects her when they run around together in the field."She is a fantastic pig and good fun. She loves running around and playing with the other dogs. It is bizarre but amazing."Coco is from the Kune Kune breed which often enjoys the company of other animals, but it is rare for them to imitate canines.Amazed Sueltan said: "This is the first time I have heard of something like this. Coco and the German Shepherd Jay are best friends."It is like a little and large partnership going on. They are brilliant together and Jay acts like her mother. The do everything together - eat, sleep and play. It is amazing and it would be hard to split the two up."Source: orange news