My 13 month old was breastfed/formula fed until about 8 months at which time he continued on formula only. He likes many kinds of babyfoods and table foods. A month ago I switched him from formula to cow's milk and almost immediately saw a change in sleeping behavior. He started waking up more during the night and getting up as early as 4:30 am. Before this he was a consistent 8 pm - 7 am sleeper. So I went back to formula and his sleeping improved. He also cut some teeth during this time, but I find that every time I try to replace formula with milk he has a bad night.
My concern is that I thought formula was based on cow's milk, so why would an allergy show up now that never had before?
Also, I have always given my kids cow's milk and now faced with one who might not tolerate it, I'm now sure how to feed him. I'd really like to get rid of the formula for cost and other reasons. I think he needs more than water to drink. I'm not crazy about soy. What do kids with milk allergies do?