definitely pay attention to your child, that's your best indicator.
With my son, at 6 months i was giving him baby food 3x's a day. But my son is a big boy (30lbs solid muscle at 18mos). He was ready for it and he let me know because he would just spit the bottle out and whine when he saw us eating dinner or just whine period until i gave him his food.
If you see your child isn't gaining sufficient weight or is getting more lethargic than usual, try bumping him up to 3x's a day. That's usually a good sign that he's not getting enough calories from his formula and needs a little extra help!
at 8:05 AM on Feb. 6, 2009