After reading Nourishing Traditions, I would think that as long as it isn't homogonized cream that it should be fine to make butter out of. Do you know if it has been pasturized? I know that "ultra pasturized" is discouraged, but other than that I'm sure it would be fine.

I'm lucky to live in California where I can go to farmer's market and get raw grass fed organic milk but...
you can too
http://organicpastures.com/

This is the highest quality raw milk...
I would start with raw colostrum Kephir...
It just has all the stuff your colon needs to get started on digesting foods.

I have a great recipe
1/2 cup colostrum kephir
1 tablespoon barlean flax seed oil
1/2 cup raspberries... they can be frozen or fresh
This is amazingly delicious and so goood for you...
I practice yoga and flow right through my poses when i drink this colostrum kephir... my energy's awesome and it kills candida!!!!!!!