We started off with a J22 Kite that worked great as a chicken chute -- the biggest issue was the cloth weight ultimately wasn't up to the task. I strongly suggest investing in a proper chicken chute. Our's is purpose built in 1.5 oz Nylon and is bomber and balanced for the boat.

:: I have a couple of old class spinnakers that could be
:: cut down to make a chicken kite. $100 each including
:: shipping.
::
:: :: We used a J22 Kite for a while and it worked fine until
:: :: we simultaneously removed everything inside of the
:: :: tapes. Last year we went with a purpose built Chicken
:: :: Chute from SC Sails and it was well worth the expense.
:: ::
:: :: :: I'm no Chicken...but we need a Chicken Kite! Does that
:: :: :: make me a chicken???
:: :: ::
:: :: :: Mike