Woodstock is the smallest of the Peanuts characters but has a big presence for a little bird. He's a little inept, his flying and logic are erratic, but he can type and take shorthand and usually is game for anything Snoopy wants to do. Although he's the butt of many of Snoopy's practical jokes, he's the beagle's closest friend and confidant -- and has made attempts at retaliation. Because of his size and the company he keeps, Woodstock is an accident waiting to happen. Being a bird and tiny, he gets a little insecure around Thanksgiving and big moving objects. He's the only baseball player who gets an automatic walk if the ball rolls over him. Woodstock talks birdspeak only, and finds an alphabet made up entirely of exclamation points quite adequate to express such emotions as ecstasy, distress, frustration and a real temper.
Shoeboy: Snoopy is an extroverted beagle with a Walter Mitty complex. He is a virtuoso at every endeavor -- at least in his daydreams atop his doghouse. He regards his master, Charlie Brown, as "that round-headed kid" who brings him his supper dish. He is fearless though prudently cautious about "the cat next door." He never speaks -- that would be one human trait too many -- but he manages to convey everything necessary in facial expressions and thought balloons. A one-man show with superior intelligence and vivid imagination, he has created such multiple personalities as: Joe Cool, World War I Flying Ace, Literary Ace, Flashbeagle, Vulture, Foreign Legionnaire, etc.
Despite the overt gender discrepancy re: Woodstock, I find the degree of accuracy to be more than a little disturbing. Or maybe I'm just "the cat next door"... Whatcha think?