RING, RING. Honey, can you get the door? There is a cow that wants in!

Do you have a doorbell that is also a camera? We've captured numerous images of cars going by, an ocasional bird and people walking past the house. Its also nice to know when a package is dropped off at the front door. We've have girl and boy scouts come to the door, a neighbor or two, but NEVER anything like this. A family received an unexpected guest to their home when a lost cow, yes a lost COW casually trotted up their side walk and knocked on their front door. Hmm, is anyone surprised to hear this happened in Texas?