“I went to the zoo and saw a piece of toast in a cage. A sign read: ‘Bread in captivity’”

“Bred in captivity” is sometimes punned as “bread in captivity.” A joke was posted on Twitter by “milk‏” on August 21, 2011:
 
“I went to the zoo and saw a piece of toast in a cage. A sign read: ‘Bread in captivity.’”
 
     
Twitter
milk‏
@miilkkk
I went to the zoo and saw a piece of toast in a cage. 
A sign read: “Bread in captivity.”
1:31 PM - 21 Aug 2011
     
Reddit—Jokes
I once saw a slice of toast in a zoo.
submitted January 18, 2013 by Belmish
It was bread in captivity.
 
Twitter
Bad Joke Cat‏
@BadJokeCat
I went to the zoo and saw a piece of toast in a cage. A sign read: “Bread in captivity.”
3:46 PM - 17 Jul 2013
     
Reddit—Jokes
Just back from the zoo. Saw a slice of toast lying in one of the enclosures.
submitted September 24, 2016 by Karl_Cross
It was bread in captivity.
 
Twitter
Shit Jokes‏
@ShitJokes
Just back from the zoo.
Saw a slice of toast lying in one of the enclosures.
It was bread in captivity.
4:33 AM - 1 Oct 2016
     
Facebook
Dad Joke of the Day
June 20, 2017 ·
I just got back from the zoo. I saw a slice of toast lying in one of the enclosures. It was bread in captivity.
 
Reddit—Dad Jokes
I saw a piece of toast in a zoo enclosure today… (self.dadjokes)
submitted June 21, 2017 by Charlovescoffee
It looked like it was bread in captivity.
 
Reddit—Jokes
At the zoo I noticed a slice of toast in one of the enclosures.
submitted October 1, 2017 by lukepeterwatson
I asked the keeper, ‘How did that toast get into the cage?’
‘It was bread in captivity’ she replied.