Hi. I have also had problems with getting my son to gain enough weight. At over 9 mos he was still only 15 lbs 4 oz. I thought he was just on the small side but the dr. was really concerned and said we really needed to get him to eat more. I was breastfeeding and starting weaning to formula at about 8 mos, and just this week I've managed to get him completely weaned (he'll be 10 mos tomorrow). I think my breastmilk was not high enough in fat. He was gaining weight well until he was about 4 mos, and then I got the flu and my milk was very watery and never really got back to normal. I don't know if that could possibly be a problem for you. My son now takes three 8 oz bottles a day, and he never got that much breastfeeding. We've also started giving him two solid snacks a day. We haven't had him weighed again, but just in the past two weeks he's grown out of some of his clothes and now he has a big potbelly! We have just this week started going straight to breakfast without a breastfeed. He seemed a little confused, but after the first day it wasn't a problem. Here's our schedule:
7:30 wake
8:00 breakfast--usually 3-4 tbsp cereal w/formula, yogurt and Cheerios
9:30 8 oz bottle
10-11:30 nap
11:30 snack--Cheerios, cheese, etc.
1:00 lunch--1/2 piece toast with cream cheese or jam, lots of cheddar cheese (he loves it lately), yogurt, fruits and veggies as finger foods, water to drink
2:30 8 oz bottle
3-4 nap
4:00 snack
5:30 dinner--same as lunch, but usually try some pieces of chicken or other meat (he hates anything pureed)
7:30 8 oz bottle and bed
Good luck!