This is a sad situation. The kids grow up on junk and that's what they have a taste for. I overheard my co-worker telling her mom (babysitter), 'Yeah, he doesn't like real chicken, he likes the processed stuff'. Then, something about the rice crispie treats she bought for him. He's 17 months.
One young couple we know was giving their 1 year old nothing but junk and he would be crabby. Their babysitter thankfully gave him fruit and other healthy stuff for snacks and several of us had a talk with them and they're trying to feed him better. He now asks for the healthy stuff. The young mother told me, 'When we were in the store he said 'nana, nana?' for bananas and how could I not get them for him?'