dog new tricks.But nine-year-old miniature dachshund Ernie is an old dog who has learned an old trick – how to walk again.A spinal condition robbed him of the use of his legs four years ago and three different vets recommended the kindest thing to do would be to put him down.But owner Elaine Brechin, of Inverurie, Aberdeenshire, refused to give up on the beloved pet she took in because his previous owners were unable to cope with his disability.After 18 months of intense therapy to strengthen