Ellis Rosen is my favorite New Yorker cartoonist. Every one of his posts on Instagram is worth browsing through completely.
One of the stories that he is gradually developing is the struggle between Mr. Ruffles, a dog who is implied to be a secret agent similar to James Bond, and an evil squirrel who is his archnemesis. The squirrel usually has the upper hand. You can find a collection of cartoons developing this storyline here.