LAST UPDATED AT 15:54 ON Tue 5 Apr 2011
Blue Peter dog Mabel with the show's presenters (l to r) Joel Defries, Helen Skelton and Andy Akinwolere. Mabel, a border collie cross, was the first rescue dog to become a regular fixture on the BBC show. She made her final appearance in March 2010.
In pictures: Blue Peter dog Lucy who has died at the age of 12, was just one of the show's many animal stars
