A Thanksgiving turkey riddle is:
 
Q: WHich side of a turkey has the most feathers?
A: The outside.
 
“What side of a chicken has the most feathers on? The outside” was cited in a 1932 newspaper. “Q: Which side of a turkey has the most feathers? A: The outside” was cited in a 1972 newspaper.
 
“Which side of a turkey has the juiciest meat?”/“The inside” is a related turkey riddle.
         
   
22 January 1932, The Evening News (Wilkes-Barre, PA), “The Office Cat” by Junius, pg. 14, col. 7:
RIddles
What side of a chicken has the most feathers on? The outside.
 
19 November 1972, The News-Palladium (Benton Harbor, MI), “Riddles,” Family Weekly, pg. 12, col. 2:
Q: Which side of a turkey has the most feathers?
A: The outside.
 
16 November 1975, San Antonio (TX) Express-News, Sunday Magazine, pg. 9, col. 4:
Q. Which side of a turkey has the most feathers?
A. The outside.
 
23 November 1975, Sunday World-Herald (Omaha, NE), pg. 1-E, col. 5:
An Impossibly Bad Riddle
Q. Which side of the turkey has the most feathers?
A. The outside.
 
23 November 1986, State Times Advocate (Baton Rouge, LA), Sunday Magazine, pg 6, col. 4:
An impossibly bad turkey riddle
Q. Which side of a turkey has the most feathers?
A. The outside.
 
7 September 1999, Los Angeles (CA) Times, “The Kids’ Reading Room; Reading by 9; Pint-Sized Punch Lines,” pg. E7:   
Which side of the turkey has the most feathers? The outside. (Ryan, 12, Tustin, Columbus Tustin School)
 
8 December 1999, Los Angeles (CA) Times, “The Kids’ Reading Room; Reading by 9; Jokes & Riddles,” pg. E8:
Which side of a turkey has the most feathers? The outside. (Owen, 6, Stevenson Ranch)
 
4 February 2001, Los Angeles (CA) Times, “The Kids’ Reading Room; Reading by 9; Jokes & Riddles,” pg. E6:
What side of the turkey has the most feathers? The outside. (Ryan, 13, Hewes Middle School, Santa Ana)
   
Google Books
Bulletin Board Power:
Bridges to Lifelong Learning
By Karen Hawthorne and Jane E. Gibson
Greenwood Vilalge, COL Libraries Unlimited
2002
Pg. 21:
Q: Which side of a turkey has the most feathers?
A: The outside!
 
Google Groups: alt.tasteless.jokes
Which side of the turkey has the most feathers?
Douglas D. Anderson
11/27/03
The outside
 
Google Books
The Happy Classroom:
From Ha-Ha to A-Ha
By Janet Aaker Smith
Marion, IL: Pices of Learning
2011
Pg. 87:
Which side of the turkey has the most feathers?
The outside.
 
Google Books
Hooked on Riddles:
A Guide to Teaching Kids Math, Science, English, and Other Subjects Using Fun Word Plays and Silly Jokes
By Mary Quijano
New York, NY: Skyhorse Publishing
2012
Pg. ?:
What side of a turkey has the most feathers?
The outside.
   
Google Books
Thanksgiving Turkey Jokes For Kids
By Peter Crumpton
PeteyRF Creative
2015
Pg. ?:
Which side of a turkey has the most feathers?
The outside!
 
Google Books
The Super, Epic, Mega Joke Book for Kids
By Whee Winn
Grand Rapids, MI: Zonderkidz
2016
Pg. ?:
Which side of the turkey has the most feathers?
The outside.