Don't think so. Last I checked he slippers at all times looked like leather to me, but I could be wrong, of course. He also seemed to sport leather jackets in all decades, definitely not the hallmarks of a vegan.
I think he qualified for for ovo-lacto vegetarian at some point, then added chicken and hence was not a vegetarian at all anymore.
I'm a pescetarian (I know, I am both despised by meat eaters, as well as vegetarians and vegans alike. I don't eat meat, not even chicken, seafood is the only thing)- so I kinda feel him on that a bit.