Reply to everyone. Foxes are obviously a hot topic, and thank you for all the comments. Its heartening to have so much feed-back from visitors to this web site.
During the recent snow, I was able to confirm something I had read about, but never seen before. Cats and dogs leave a double trail of footprints behind them, left and right. Foxes leave just a single trail of step marks, as if they are walking a tightrope.
Oh, and one final thing to the receivers of fox dung. This is an important wildlife resource and many dung beetles feed in it. There has been much concern that stock animals (cows, horses, sheep, goats, deer), given systemic pesticide medicines are producing incecticidal dung, killing off the beetles that would normally recycle their droppings. This has serious ecological consequences, increasing the numbers of flies breeding in the dung. Cats and dogs treated with anti-flea medicines may also have dung less readily removed by the eager beetles, which find themselves poisoned instead. Fox dung, unpolluted by toxic chemicals, is a valuable reservoir for this fascinating and important beetle fauna.