“A woman and a duck walk into a bar…” (bar joke)

“A guy walks into a bar…”  is a typical form of what has been called the “bar joke.” One duck version is:
 
“A woman and a duck walk into a bar. The bartender says, ‘Where’d you get the pig?’ The woman says, ‘That’s not a pig, that’s a duck!’ The bartender says, ‘I was talking to the duck.’”
   
The joke was cited on a website in 2007.
 
         
A Guy Walks Into A Bar and More Bar Jokes (December 17, 2007)
A woman and a duck walk into a bar.
The bartender says, “Where’d you get the pig.”
The woman says, “That’s not a pig, that’s a duck.”
He says, “I was talking to the duck.”
 
Ubersite 
Two guys walk into a bar.
Submitted by AJ at 2009-05-07 08:50:22 EDT
(...)
COMMENTS
Submitted by TuTs at 2009-05-07 19:52:21 EDT
A woman and a duck walk into a bar. The barman asks “where did you get the pig”?
The woman says “thats not a pig”. The barman answers “I was talking to the duck”.
 
Google Books 
Ultimate Book of Jokes:
The Essential Collection of More Than 1,500 Jokes
By Scott McNeely
San Francisco, CA: Chronicle Books
2011
Pg. ?:
A woman and a duck walk into a bar. The bartender asks, “Where’d you get the pig?” “That’s not a pig, that’s a duck,” the woman answers. The bartender replies, “Look, I was talking to the duck.”
 
Google Books
Little Did I Know
By Mitchell Maxwell
Stamford, CT: Studio Digital CT, LLC
2011
Pg. ?:
Secunda:  “A woman and a duck walk into a bar. The bartender says, ‘Where did you get the pig?’ The woman says, ‘That’s not a pig, that’s a duck.’ The bartender says, ‘I was talking to the duck.’”
     
Freakin’ Awesome Network Forums
“Guy walks into a bar” jokes      
The Adventures of Tae Kwon Joe
Jun 8, 2011 at 8:10pm
A woman and a duck walk into a bar.
The bartender says, “Where’d you get the pig.”
The woman says, “That’s not a pig, that’s a duck.”
Bartender says, “I was talking to the duck.”
 
Bodybuilding.com
So a woman and a duck walk into a bar
dankydank
06-11-2011, 10:24 PM
The bartender says, “Where’d you get the pig.”
The woman says, “That’s not a pig, that’s a duck.”
He says, “I was talking to the duck.”
 
Bars and Bartending
One-Liner Walks Into A Bar Jokes
POSTED ON JUNE 2, 2013 BY THE BARMAN IN BAR HUMOR
(...)
A woman and a duck walk into a bar.
The bartender says, “Where’d you get the pig.”
The woman says, “That’s not a pig, that’s a duck.”
He says, “I was talking to the duck.”
 
Reddit
A woman and a duck walk into a bar.
submitted October 7, 2016 by anxiousocially1
The bartender says, “Where’d you get the pig.”
The woman says, “That’s not a pig, that’s a duck.”
He says, “I was talking to the duck.”