Read this strip at gocomics.com.
This is the first strip that implies that Snoopy's doghouse has some extra-dimensional property, that it's bigger inside than outside, although one can take Schroeder's comment to suggest that the rec room is in a basement, and thus underground. Dog houses don't usually have basements, true, but....
This strip is also evidence that Snoopy is not yet considered to be Charlie Brown's dog. If Snoopy really were his, wouldn't he already know all this? As a kid I stumbled upon this strip and wondered why the neighborhood kids were invited into Snoopy's doghouse while Charlie Brown was not, even though he was Snoopy's owner. It seemed to project upon the kid a sense of being a social pariah that I think stuck with him when I read other, later strips. Viewed in context with the Peanuts strips up to this point, he doesn't seem to be quite so excluded.
Does Snoopy's rec room have as low a clearance as his entrance? That could be considered to be something of a flaw if the people he usually has over are all kids.
