Peanuts by Charles Schulz for September 21, 1955
Transcript:
Snoopy's ears shoot up and Schroeder looks into the paper in Charlie Brown's hands as Charlie Brown reads, "National Dog Week.."<br> <br> He continues, "It is indeed the happy and harmonious family who shares a dog's wonderful qualities of love, loyalty, watchfulness, and courage"<br> <br> Snoopy looks down and blushes bashfully as Charlie Brown continues, "..Which he gives with no thought of reward.."<br> <br> Charlie Brown turns to Snoopy and declares, "Boy, I'd blush too, if I were you!"<br> <br>
This might be the first one that starts to establish Snoopy as Charlie Brown’s dog.