P.R.
We had twin premature girls. 33 weeks gestational at 4 lbs & 4 lbs 1 oz. Most doctors will tell you that premature babies will completely catch up, developmental wise, by the age of 2. But I think it differs with every child. Babies catch on really quick...I would stimulate them and let them show you if they are ready for the next step. Our girls was never behind full term babies, in fact, they were ahead. They had over 150 words vocabulary by the time they were 18 months. As far as eating, we incorporated cereal into their bottles at 8 weeks (actual age) to help them sleep through the night and offered solid foods at 6 months (actual age), starting with vegetables. Hope this helped. Good luck!