Hank Isn't Bobby's Biological Father On King Of The Hill And It's Obvious If You Pay Attention

List Rules
Vote up the most believable pieces of evidence that indicate Hank is not Bobby's father.

King of the Hill is one of the best adult animated shows that ran for 13 seasons from 1997 to 2009. It followed the everyday life of Hank Hill, a propane salesman, and the lives of his friends and family in Arlen, Texas. But you already knew that. You're here for the good stuff, like all of the crazy King of the Hill fan theories, weird facts, and things you never noticed about the show. Like how Hank isn't Bobby's father... 

Sure, there are plenty of awesome Hank and Bobby moments, but have you ever noticed that Bobby looks exactly like Bill? Or that he and Hank never seem to see eye to eye? What about that time Bill passed on his secret "family recipe?" The facts have been right in front of your face all along. Check out all the evidence that Hank is not Bobby's real father and vote up the best reasons!