We went dairy (and gluten and egg) free starting a few months ago with my DS --also intolerant. Unfortunately, he won't really drink any of the alternatives (he LOVED milk), but I think it's because I started out with one he didn't like so now he doesn't really want to have it at all. I originally tried the vanilla almond milk because I thought the sweetness would help the transition, but it was too sweet for him
. The other day I tried coconut milk and surprisingly he seemed to like it. Hasn't had any since, but I'll keep trying. Rice milk was really watery and he literally opened his mouth to let it all fall out instead of even swallowing lol.
We use Daiya brand cheese here -- he really loves it. It also melts nicely. It comes in a big block or in shreds and in different flavors.
For ice cream, he's starting to like Rice Dream.
For yogurt, he really likes the So Delicious Greek Style Coconut Milk yogurt. It has a good amount of calcium in it -- that's the other thing -- when you buy your milk, some of them add calcium and some don't, I try to get the brands that have more calcium.
In cooking, I used coconut butter (Earth Balance brand).
If you feel like you need to add more calcium into his diet, if he likes OJ many of the brands have added calcium. Additionally, blackberries are a source of calcium.
Good luck!!