I don't know all the info you asked for... We ponied up the cash for raw skim milk once (just becoming available in health food stores here) and it was just eh. It soured quickly and DH tossed it before I could make use of it in that form. (He was just acting out of habit and knows not to do that next time.

) We got non-homogenized local-ish (Central CA) fresh whole milk in a glass bottle most recently and THAT was DELICIOUS!!!! It isn't certified organic and I just happened upon it one day, so I don't know anything about the farm or the supply chain. Before buying it again, I would research it a bit more. However, I can tell you without a doubt it was the best tasting milk any of us have EVER had! It had some bits of cream still in it and luckily I was the first to try it and gently educated others drinking it that this was a good thing. Everyone loved it and that half-gallon was gone in no time flat. We usually go a week with only a half-gallon of milk and sometimes have to pitch the last inch or so.
I am the most sensitive to milk in our house and I had zero issues with either the raw skim milk or non-homogenized, but pasteurized (not ultra-pasteurized) milk in that way. I am currently trying to find a closer source for the non-homogenized whole milk (both a closer store/place to purchase and hopefully a closer location where the cows are raised and milked).
With many transitions, I have mixed the familiar with the non-familiar and gradually decreased the familiar to the point where the new item is 100%. Maybe this would ease your DD's system through the transition? Best wishes, mama!