Since my little man just turned 4 months we have started him on baby food. My doctor said there was nothing wrong with it. We started feeding cereal at 3 months and he went a few hours longer at night. We have had good luck so far with this. He seems happier and it keep him more on a feeding schedule rather than sporadic. We have to give him prunes with his cereal now to keep his bowel movements on regular.
I have also been making his food and getting it in the organic section. It does take all morning to do 4 foods. I saved glass jars and freeze them so it doesn’t spoil. It has saved us a lot of money though and for me I would rather put the time in and save. Anyways…hope this helps someone on feeding baby food to your 4 month old.