I find weaning fun but a bit of a bother too. The days of pull out your boob and feeding is done are so much simpler in some ways. Tomas is loving it though. He pretty much eats 4 meals a day already because that is what his big sister eats and he kicks up a fuss if he sees food and isn't given any.
Carnat- it can't be a lactose intollerance if she is fine with your milk because human milk has as much lactose as cows milk. Sometimes doctors without experience will get confused and tell you its a lactose intolerance because its common in older people but it is actually pretty rare in babies. It is the protein in cows milk that babies react to. There are two different types of reaction babies can have. One is a direct allergy and the other is a more slow reaction. Some doctors call both types of reaction an allergy others say the first is an allergy and the other an intollerence. Only the direct allergy can show up on tests but they don't tend to bother testing anymore anyway because the test is not very reliable anyway. Usually its much easier just to see by their reaction to eating the food. Unfortunatly there isn't much that can be done but to avoid dairy. It is quite common but most babies outgrow it by the time they are two.
Butter is mostly fat and has had the proteins processed out of it which is why a lot of people with alllergy to milk are okay with butter. Sometimes yogurt and cheese are better than straight milk because they are more broken down already. But some babies can't have any cows milk products of any sort and some even react to beef. A high percentage also react to goats milk or soy products because the proteins are similar.
Try googling under: cows milk protein allergy, CMPA, cows milk protein intollerance or CMPI and you will find lots more info, support groups etc. Sorry to dump so much info on you but it took us ages to work out what was going on with DD and doctors are not always very well informed. In the end we found a really good doctor but it took a while and we got the most help online from other parents. It is a real pest but there are worse things.