However, I think getting the acidophilus powder in pure form is a good idea to be given as a probiotic. Usually a capsule contains 3 billion cfu per tablet or capsule or the powdered form will say on the container how much one teaspoon or more contains.

I think your SCD kids should have about 3 billion cfu to start with (divide it up for the first week giving half in a.m. with breakfast and half in pm with bedtime snack. ) Experiment and see how they react. You can go higher if they have no bad reactions. Go no higher than 9 billion cfu per day.