An older baby can have up to 32 ounces of formula per day. In addition, he can have as much in the way of solids or water as he wants to supplement this. The mealtime formula is usually given at the end of the meals, to top off the solids in a comfortable and easy way.
A DO is called an osteopathic doctor, while an MD is basically known as a general medicine doctor. A DO trains where the MD trains and completes the same number of years to finish the degree itself. A DO is better because it they have additional expertise other than the general studies ones.
The difference between Doctor and Professor is in the rank they hold at a university setting. Doctor is an honorary title that can be conferred on anyone having completed his PhD, or doctorate, as it is commonly known.