Peanuts by Charles Schulz for May 13, 1973
Transcript:
Snoopy is seated on his doghouse He looks at Woodstock, who walks up, carrying a sign.<BR><BR> Woodstock walks past. The sign reads, "MOM?"<BR><BR> "Snf!" Snoopy starts to cry. He thinks, "That's the saddest thing I've ever seen..especially on Mother's Day..."<BR><BR> Snoopy lies on his stomach with his head hanging over the edge of the doghouse. He thinks, "Of course, who am I to talk?"<BR><BR> He lies on his back, thinking, "I don't know where my Mom is either...I don't know where my Dad is or any of my brothers or sisters.."<BR><BR> He sits up and thinks, "That's terrible.."<BR><BR> Snoopy marches, carrying a sign which reads, "WHERE IS EVERYBODY?"<BR><BR>
It’s already established that he was an “only” beagle.