It’s Thanksgiving Day & the aroma of roast turkey fills Charlie Brown’s house. Snoopy, outside, lying on top of his doghouse, smells that aroma, & he is thinking, “It’s Thanksgiving Day. Everybody eats turkey on Thanksgiving Day.” So he lies there, watching the back door, eagerly awaiting his Thanksgiving dinner.
Finally, the door opens & here comes Charlie Brown with a bowl of dog food, & he puts it on the ground. Snoopy gets off his house & stares at the dog food with a forlorn look on his face. And he thinks, “Just because I’m a dog, I have to eat dog food on Thanksgiving Day.”
Then the next square shows him looking at the dog food more intently, & he is thinking, “It could be worse. I could be the turkey.”
Source: Peanuts Comic strip