“Why was the racehorse named Strawberry Ice?”/“He was a sherbet.”

A sherbet riddle is:
   
Q: Why was the racehorse named Strawberry Ice?
A: He was a sherbet (sure bet).
   
The joke was posted on Twitter on November 2, 2009.
   
       
Wiktionary: sherbet
Noun
sherbet (countable and uncountable, plural sherbets)
1. A food of frozen fruit juice with a dairy product such as milk added; a sorbet with dairy ingredients.
2. An effervescent powder made of bicarbonate of soda, sugar and flavourings, intended to be eaten alone or mixed with water to make a drink.
 
Twitter 
Cameron
@ThatFishGuy
Bad Melbourne Cup joke: Why was the racehorse named Strawberry Ice? Because he was a sherbet!
9:24 PM - 2 Nov 2009
   
Twitter
nadine_corkins2
@nadine_corkins2
Why was the racehorse names Strawberry Ice? He was a sherbet!
9:49 AM - 14 Dec 2009
   
Twitter
Rachel Burdett
@Rashel_Jr
Why was the racehorse names Strawberry Ice?He was a sherbet!
5:08 AM - 25 Dec 2009
       
Twitter
Dibbsy
@dibbsypugh
Replying to @MCliffordLewis
@MCliffordLewis @steveytay1 @Leelst1 @Sainty80 I backed a horse name Strawberry Ice - I thought he was a sherbet!
1:13 PM - 14 Apr 2012
 
Twitter
Gambling City
@Gambling_City
Why was the racehorse named Orange Cream?  Because he was a sherbet!  Visit GamblingCity for #HorseRacing info at: http://bit.ly/IFKJhp
7:41 AM - 2 May 2012
   
Twitter
HAYMAKER
@NorfolkHaymaker
.#CrackerJoke   Why was the racehorse names Strawberry Ice?
He was a sherbet!  @NickConradtweet @david_insideout @CGoreham @BobRutler @jayrmlawrence @Phil_Daley
6:21 PM - 6 Dec 2017
 
Twitter
lorraine Jo King
@LahLahBean
#sillysaturday Why was the racehorse named Strawberry Ice? He was a sherbet!
2:09 AM - 14 Apr 2018