E.S.
I started my daughter on cereal at 3 months mostly because she would eat so much that we would get low on formula way to soon. She mostly would eat cereal at lunch or dinner she really didn't care for it in the mornings. I would wait at least a week before trying anything else just incase of an allergic reaction. I also started vegtables around 4-5 months since she always tried to reach for everything I had. Honestly some kids are just faster at developing than others. One my daughter was on whole milk by 10 months along with no more bottle or pacifier. Less trouble to get rid of old habits sooner before they start getting super attached to it. by her first birthday she was eating everything we were and drinking out of a sippy.