It really all comes down to what works best for you and your baby. My first I breast fed only -til 4 mo, did both til- 6 mo, and had no cereal til 5 mo and only from a spoon. She gagged and choked on all but one kind of bottle and nipple, and feeders were the worst. She started sleeping good around 3 months old if I remember right. She was colicy from 2wks old til about 6wks. I quit drinking milk and it stopped. She ended up on soy products til she was 2. No problems now though. No ear problems or lactose intollorance. I just went by the doc and books best I could.
Now my son was a whole other story. They were only 2 oz different at birth but he has a much bigger appetite. The books say they will sleep through the night when they are ready. And around the clock cluster feedings during growth spurts is normal. I breast fed him 2 mo only - til 4 mo mixing breast milk and formula in a bottle 2ce a day and supplemented one more mo then stopped at 5 mo old. I had to ease him into formula because he was gassy and colicy til 4 mo old and nothing really helped. It wasn't diet related. No one formula relieved it. No food elimination helped. Gradual mixing helped. and something called gripe water. I didn't have a pump with my daughter so her supplements were all formula. Gas wasn't the problem though with her. She would throw up and get diahrea from formula except soy, she grew out of it eventually. My son either got gas or would go days without a bowl movement, not constipated exactly but uncomfortable til I tried mixing.
He didn't sleep more than 2 hours in a row for the 1st 6 wks of his life...everyone said to give him cereal, but the doc said no and I hadn't with my first one...finally at my exhausted whits end and feeling so sorry for him, I quized my doc and spelled out my situation, my sons colicy symptoms were always based on hunger his weight gain was great so my milk was fine, I gave in and gave him formula a few times to see if he just needed more but he still didn't sleep better,
she said that it was really not gonna hurt him to give him cereal once in a while, (one tsp to two oz formula or breast milk), he was too small for a spoon, what works best for us is a fast flow nipple to the same bottle, just mix well before you let any cereal enter the nipple, the dry pieces will plug it. My doc said that they don't recomend cereal too early because of the excess calories, for fear people will add it to all bottles to cut expense, some get constipated, and if they are going to get excema it can bring it out early, well cereal in the bedtime bottle is still our routine and he is fine, not too big, no excema or constipation and it worked well. His gas got better too. My daughter who didn't have it early did have excema, go figure. Neither one 12 yr old or 8 month old has ear problems. Or anything else. I was lucky he did both breast and bottle so easily, my daughter was harder. Both preffered platex and brown not clear nipples, he likes regular nipples she liked the nuk, anyway to each his own. He still has spells of a few hungry nights. Its all part of the mommy experience.
good sleeping
HS