Sometimes the heavy stylization of Peanuts works in the service of a gag. In this strip, it isn't clear what exactly it is that Snoopy is doing until he tells us in the last panel. Although "whoops!" is kind of a weird thing to say in response to something cold pressed against your back.
Snoopy isn't as long in these panels as he was a few weeks back, he looks to be of a more reasonable size compared to when he's sitting down. But we do have a few panels where we see his face in three-quarters' perspective and get that weird broad face. Snoopy's snout really only exists in profile.