Sorry you think she is having dairy allergies.
Matthew had green poop for a bit, but the main thing was mucus in his poop. Green poops can also be a sign of foremilk/hindmilk imbalance, so you might look into info on that too.
I cut out all dairy, including traces of dairy. You can drink soy milk, but a lot of babies with dairy protein intolerance have soy protein intolerance as well. I drank hemp milk, you can also use rice milk or almond milk, though those don't have a lot of fat.
For butter, it is really hard to find any that doesn't have dairy, but they have some at Whole Foods.
Cheese and yogurt you are just out of luck.
The best thing you can do is avoid pre-packaged foods, as many of them have dairy. Check your breads, many don't have dairy so that shouldn't be too hard. Avocados have good fat, I ate lots of eggs, and meat of course. Then any fruits, veggies, oatmeals. Get some good seasonings if you are like me and used to cheese then you can use the seasonings instead for your meat and veggies.
Oh and nuts are good too! I cut them out as well since I thought they might be an issue, but in hindsight I don't think they were.
Let me know if you have any other questions!