Owners stunned as Valerie the dachshund puts on weight after 18 months alone on island / Dachshund reunited with owner after 18 months lost on island had put on weight / A miniature dachshund is reunited with its owner after 18 months lost on an Australian island / Miniature dachshund that would 'never leave' owner's side found alive 16 months after being lost in wilderness / Thousands of dachshund dogs descend upon beach for 'sausage walk' / Emaciated dachshund trapped in pet carrier down Kelowna embankment