There are kefirs made with other liquids. Often people with lactose intolerance can ingest cultured milk products as the lactose is somehow changed into something else with the culturing process.
The only thing I can have from a cow is the butter (and meat).
Not sure of where to get 100% goat milk; I know they mix cow milk in with goat milk to make feta cheese.
And once I found raw milk and started drinking it, I could never go back. It is so delicious and helps with my sinus and allergy issues. But I know it is illegal in some states.