We have never given our 3 children milk. In fact, I haven't had it in almost 20 years. They are healthier than any of their friends and have no food allergies. We give our kids (well the 2 boys, since I'm still BFing our daughter) a teaspoon of liquid calcium nearly every night. The sleep well and don't end up with growing pains or excessive mucus production from the dairy. www.notmilk.com
SP CalLactate is great, but it's only one source of calcium, just like the liquid calcium I mentioned above so as your daughter gets older, she'll need a more complete source of calcium.
I use CalMag+ for me and sometimes grind this up for the boys. www.worldlifesupplements.com and if she's still constipated, she may need more natural magnesium or add a PB8 to balance our her intestinal flora.