Alexis is wearing the Shock Collar this morning!

Today's question: When there’s a torrential downpour of weather outside, it’s not uncommon for you to hear people say “It’s Raining Cats and Dogs.” There was a reason why those particular animals were chosen for the phrase. I can tell you it comes from England in the 17th century, but beside that.... please tell me what is the origin behind the phrase “Raining Cats and Dogs?”