A news item like this makes it seem that the story of Rome's founders being raised by a canine may have some tiny grain of truth to it:
http://www.CNN.com/2008/WORLD/americas/08/22/argentina.dog.tale/index.html

Brief Summary of Rome's Founding

A wolf finds two male babies and raises them. They go on to found the city of Rome, Italy. Although I must admit there are quite a few fanciful embellishments to the story I'm not so inclined to believe.
Wikipedia: Rome, Romulus & Remus

Brief Summary of the Above News Item

A dog that had recently given birth heard the cries of an abandoned human baby, and brought it in to her own litter.