An incidental conversation with a friend brought this video and topic to the forefront, concerning Walt Disney drawing a picture of a pig on the side of the family barn in tar, where he was growing up as a youngster in Marceline, Missouri. You can see the reference to it at around 10 seconds into this video from the Walt Disney Family Museum in San Francisco. The video is a nice encapsulation of Walt's life in a minute's time. Thanks to ANer 9oldmen for bringing it to my attention. Here's the link to the Forum topic.