Peppermint Patty and Marcie are voiced by male actors.
Vince Guaraldi sung the vocals for the song "Little Birdie", one of the rare moments he lended his voice to the music he created for the Peanuts specials, the other being "Joe Cool" in "You're Not Elected Charlie Brown",
Lucy appears only at the beginning of the film when she is playing football with Charlie Brown. After that she disappears for the rest of the movie.
Snoopy's fight with the folding lounge chair appears to have been inspired by W. C. Fields' similar struggle with a chair in 1934's "It's A Gift."
The only other Thanksgiving-related special in Peanuts media is "This is America, Charlie Brown," about the Pilgrims' voyage to Plymouth with all characters portraying the Pilgrims themselves.