You might not be able to teach an old dog new tricks, but this dutiful pet could give some of us a lesson. Dressed in a Christmas jumper with reindeer antlers, rescue dog Millie picks up litter dropped by lazy humans and disposes of it. Owner Alfie Kitson, 80, has only to point at rubbish on the ground and say ‘put that in the bin’ and the five-year-old Spanish podenco ...