Who eat flying dogs?

Dogs are mentioned in Muslims holy book the Quran several times e.g. in the main story of sura 18 where a dog is a companion of the dwellers of the Cave. The Quran also tells that it is permissible to eat what trained dogs catch (5:4). Nevertheless, many Islamic teachers state dogs should be considered unclean and that Muslims licked by them must perform purification. According to Hadith, anything a dog touches must be washed seven times, the final time in dust. Some religious traditions hold that if a dog passes in front of someone preparing to pray, that it pollutes their purity and negates the prayer.