Here's another option....stop using dairy products all together! We had to stop using them when my youngest was around 3 years old, as all the problems with allergies and upper respiratory illnesses he had had were caused by dairy.
So, the whole house stopped eating dairy because he couldn't. Its been great! I used to have allergies all the time, also, and we all used to suffer the normal gamut of colds and infections brought home from school and work. Its been many, many years since we have had to take an antibiotics and we have suffered only a few times in all these years with a brief allergy in the spring or fall.
That boy is now 16 and I have to look up at him...way up! Don't let the medical profession convince you that you have to feed dairy to get the necessary calcium. You can gain more calcium with eating green, leafy vegetables than with dairy any day. My mother and father went extreme vegetarian about 15 years ago. My mother's bone scans are that of a 21 year old girl. All her sisters, on the other hand, have severe osteoporosis and have steel rods in their backs. She is 74 years old and she works like a man every day, can do a beautiful series of cartwheels across the yard and doesn't have one health problem...now! Not since going without dairy and switching to raw veggies.
Drinking milk is not necessary, folks. As a matter of fact, humans are the only animal that continues to voluntarily drink milk, on a regular basis, after weaning!