J.,
Formula really isn't the best thing to switch to after weaning from breast feeding, especially soy. Try a goat milk formula that's recommended by the guru of all pedi's, Dr. Sears.
Before 1 year of age:
6 scoops Meyenberg Brand Powdered Goat's milk
36 ounces of water (bottled NOT tap)
6 1/2 Tbsp of brown rice syrup (needed under 1 year for more carbohydrates)
After 1 year of age:
8 scoops of Meyenberg Brand Powdered Goat's milk
32 ounces
Discontinue with the rice syrup
I went straight from 11 months of (my son weaned himself, believe it or not :-))breastfeeding to this due to the just horrible ingredients that make up cow or soy formulas. Pastuerized, homogenized cow's milk leads to diabetes and allergies, while soy formula is like giving the equalivent of 9 birth control pills to to it's estrogen-like properties. Goat's milk is the closest you can get to breast milk in content except it doesn't contain enough carbs like breastmilk so you have to add them with the brown rice syrup. (DO NOT add corn or refined sugar to the bottle for carbs).
My son thrived on this formula and at age 3 still loves it! We do not give him cows milk unless it's in cheese and that's limited. He's never been on antibiotics, never had an ear infection and doesn't have any allergies, he's also never been vaccinated (but that's a different topic :-)). I don't think that's it's a coincidence that my son is so healthy. I may be a maverick and a little strange to many moms on this board, but looking at his classmates who have continual runny noses, take meds like they were candy and end up in the pedi's office monthly, it can't be a conincidence. Good luck and sorry to be so long winded.