Yeah, I was surprised Frank Cady passed away a couple of years ago, he seemed to live a really long and good life. Matter of fact, I recently learned that he was actually the original choice to play Otis, but when he tested for the part, he decided to act differently from the kind of stereotypical town drunks you saw on TV, which apparently wasn't what the producers were wanting, so he didn't get the part (of course, he showed up later as Mt. Pilot's town drunk when Otis "ran away from home").
Now Tom Lester (Eb) is the only GREEN ACRES castmember left now. :(