Be careful. Removing dairy means all milk, butter, cheese, cream cheese, sour cream, etc. It also includes product ingredients such as "casein" and "whey," or even words containing the word "casein." Read labels - items like bread and tuna fish often contain milk products. Even soy cheese usually contains caseinate.
For more information on dairy-free living, there's a very good book called Raising Your Child Without Milk by Jane Zukin. There is also a very good little book called Don't Drink Your Milk by Frank Oski (the late head of Pediatrics at Johns Hopkins and author of Essential Pediatrics). This book cites the results of several research studies that conclude that milk is an inappropriate food for human children. It is available for $4.95 from Park City Press, PO Box 25, Glenwood Landing, NY 11547, ISBN #0671228048.