Answer: Yes! Lots of things in history are older than the Book Chook. Take the Bayeux Tapestry for instance.
Said by some to be the earliest British comic strip, it is actually embroidery rather than tapestry as we know it today. Nobody really knows when or why it was created, but some ingenious theories exist.
If you're interested in finding out more about the tapestry, check out this wonderful four and a half minute video, which actually animates the embroidered images to explain the story.
(Thanks to Freetech4teachers for the link.)
Are you wondering how I created my own Bayeux-style artwork below? There's a wonderful website which encourages kids to create Bayeux Tapestry style stories. It's the Historic Tale Construction Kit. (link updated to new website January 2012 - thanks @eisenheinrich!) The interface is just beautiful, with the editor looking as if it is made from material. Press start and you will see your choices, which you can drag and drop to the canvas. Once there you can shrink/enlarge, or flip an image with the mirror button. Switch to text mode, put your cursor on the canvas, and type to create the words you want.
Isn't this a fantastic way to encourage kids to engage with story? I had a great time exploring and trying words with medieval font. Sometimes the editor was a bit cranky, but it's worth persevering to get such a visually stunning result. Even if your kids are a little young to understand the Norman Invasion of England, I think they might enjoy making their own Bayeux comics.