“There is only one smartest dog in the world, and every boy has it”

“There is only one smartest dog in the world, and every boy has it” is a saying that has been printed on many images. “There is only one pretty child in the world, and every mother has it” is an older, related saying.
 
Comic Dictionary BOYHOOD The time when there is only one smartest dog in the world, and every boy has it” was printed in the Miami (FL) Heraldon May 22, 1956. “There is only one smartest dog in the world, and every boy has it” was printed in the book 20,000 Quips & Quotes (1968) by Evan Esar (who also authored the Comic Dictionary).
 
 
Newspapers.com
22 May 1956, Miami (FL) Herald, pg. 1, left masthead:
Comic Dictionary
BOYHOOD
The time when there is only one smartest dog in the world, and every boy has it.
 
Newspapes.com
27 June 1956, Humboldt Standard (Eureka, CA), pg. 4, col. 5:
Comic Dictionary
Boyhood

The time when there is only one smartest dog in the world, and every boy has it.
(Copyright, 1956, by Evan Esar)
   
Google Books
20,000 Quips & Quotes
By Evan Esar
New York, NY: Barnes & Noble, Inc.
1968
Pg. 239:
There is only one smartest dog in the world, and every boy has it.
 
Google Groups: it.discussioni.animali.cani
Cercasi ...
infodj
Dec 21, 2002, 5:03:11 PM
(...)
“There is only one smartest dog in the world, and every boy has it.”
—Anonymous
     
Google Groups: alt.home.repair
Flood Friendly Basement F
,<>barry martin
Nov 18, 2004, 10:31:11 AM
(...)
There is only one smartest dog in the world, and every kid has it.
 
Google Books
Chicken Soup for the Dog Lover’s Soul:
Stories of Canine Companionship, Comedy, and Courage

By Jack Canfield
New York, NY: Scholastic
2005
Pg. 239:
There is only one smartest dog in the world, and every kid has it.
Louis Sabin
 
Google Books
Why We Love Them So:
Surviving the Loss of an Animal Friend

By Father Paul A. Keenan
New York, NY: iUniverse
2009
Pg. ?:
There is only one smartest dog in the world,and every child has it.
 
X/Twitter
cdlusso
@cdlusso
There is only one smartest dog in the world, and every child has it. http://canedilusso.com
#canedilusso #lusso #luxury #dog
1:00 PM · Sep 21, 2021
 
X/Twitter
Ernie and Berti
@Berti_and_Ernie
There is only one smartest dog in the world, and every boy has it. -Anonymous #quote
8:50 PM · Apr 26, 2022