There are tens of thousands of stray dogs on the streets of Moscow. Hanging around building sites and subways, they're rarely aggressive, although attacks have been known. No doubt it's pretty scary when you walk down an empty street at night and suddenly a pack of dogs appears around the corner. These homeless hounds are considered a problem by the Moscow authorities, who have promised to sterilise and tag them, and say they have even built a number of dog shelters. On paper it looks quite good. But animal rights activists claim that the reality is much gloomier