you can't animate certain strips... this is one of them... Opus and Bill's voices should always be one of the readers imaginations. The same goes for Calvin & Hobbes.. animating them would have destroyed my own imagination of what they'd be like.
oh my god! yes! i thought no one else remembered this! i've asked so many people but only my family knew about it! oh so awesome...i love bill and the pig/rhinoceros.