In 1991, one of Trix's television ads ended in a cliffhanger accompanied by a write-in survey asking children whether the Trix Rabbit should be able to finally get a taste of Trix. The commercial consisted of the Trix rabbit competing in a triathlon, in which the prize was Trix. The race was presided over by two judges. When the rabbit ended up winning the race, one argued that the rabbit was entitled to the price because he won. The other judge was against this, since 'Trix are for Kids.' The commercial ended by encouraging kids to vote on whether or not the Rabbit should have Trix and mail-in ballots were included in cereal boxes. America's children responded with an overwhelming "yes", and a subsequent television ad depicted the rabbit finally getting to eat a bowl of Trix cereal. While he is known to have previously enjoyed a bowl in 1976, following this public intervention in 1991 he has not succeeded in gaining access to Trix again. However, in one commercial in the early to mid-1990s, the rabbit (disguised as a police officer on a motorcycle) managed to eat a spoonful of Trix given to him by two children on bikes, but he was so happy he went a little crazy and the costume fell off as usual.
http://en.wikipedia.org/wiki/Trix_Rabbit