Quote from : The Gospel According to Peanuts Book

as Schulz himself has pointed out, Snoopy is capable of being 'one of the meanest' members of the entire Peanuts cast ... he is lazy, he is a 'chow-hound' without parallel, he is bitingly sarcastic, he is frequently a coward, and he often becomes quite weary of being what he is basically -- a dog. He is, in other words, a fairly drawn caricature for what is probably the typical Christian.