Lately I have gotten at least 5 emails claiming that some pervert has been giving dogs in dog parks, cheese cubes with nails stuck in them. There is a photo with the email that shows a handful of cheese cubes that has what looks like upholstery tacks in them. Well, it's an urban legend. There have been no dog park deaths due to nails in cheese. Of course, I wouldn't let your dog take treats from someone else but the email is a hoax.