like bunny run, is there any chance to win there ? 
You mean as in have your pick come in first place ( because you should get a payout even if it comes in last )?
Over the long run you should come in first 25% of the time. See nima's post above:
https://bitcointalk.org/index.php?topic=90718.msg1188706#msg1188706
And of course, feeding your bunny with some delicious carrots would help too
Also bunny racers of the day are paid. Read https://bitcointalk.org/index.php?topic=108834.msg1193846#msg1193846 for txid.
Born to race bunnies
This reminds me of Chicken Jockey by Xgenstudios.