Are your boys lactose intolerant?? If so what are they on??
Both my boys are MPI (probably soy intolerant as well, but I'm sure you can tell, we don't do soy in our household..lol
) I'm currently tandem nursing, so that kinda takes up the "milk" needs. I'm on a specific ED to avoid any intolerance triggers they might get from my BM.
Ds1 does get coconut milk though that I make from home. It's quite easy to make actually: Bring to boil (but do not boil) 1 cup of unsweetened shredded dried coconut and 1 cup of water. Cool down and blend well in your food processor. Strain through cheesecloth or a fine strainer.
Of course, if you were doing this option you might want to look into upping his greens for calcium (broccoli is a great non-dairy source of calcium)
I don't see why switching to a different source of milk would be a problem. Again, just be careful with Almonds. Has he had any nuts before? Any reaction to them? I would search for an Almond Milk that does not have any added sugars and the least amount of "extras" in the ingredients, kwim?
Also, I know you didn't mention it, but I would stay away from rice milk, personally. I know in North America anyways, most rice milks contain arsenic
I'm sure the probiotics are helping!
They do wonders for the whole body!! That's great he's already on them