Mind of His Own

At what point do babies have a mind of their own? Last night, I noticed that my grandson definitely had strong preferences. He is a great eater and will eat anything you put in front of him.We were having dinner at a restaurant and he was happily eating the meal that his mother brought for him in a thermos that keeps the food warm. He had chicken, pasta and zucchini, his favorites. That is, until his mother's meal came out. As soon as he saw her meatloaf, mashed potatoes and broccoli, his dinner was no longer so appealing. She gave him a spoonful of his dinner and he put his hand into his mouth, pulled out the food and threw it on the floor. He then started to point at her potatoes, saying, "Tay tay. She tried to continue feeding him his own food but he kept pushing her hand away. She is not usually one to give into a baby, but we were in a public place. She decided to just feed him what he wanted and he ate about half of her dinner. He knows what he wants and knows how to get the point across.