I started to give Alex cows milk again nearly two weeks ago and we have had a couple of horrible nappies but nothing like when we found out he was lactose and i must admit they look better than when he was on the soy milk.
He has about 400mls a day of cows milk and is sleeping fine with it also.

So he was about 15months old. Hopefully he will be able to continue with cows milk.

Christy if Matilda is okay with what cows milk you are giving her then just increase it over time. Good luck and i hope everything works out well with the cows milk.