Goat's milk is healthier, but more expensive because they're smaller than cows. Cow milk produces so much extra mucuous at least with me. I wake up coughing, it's digusting. That's why I'm getting rid of it.
I have been a student of Ayurveda for quite a number of years. According to this very ancient system, milk needs to be boiled and drunk hot or warm, and if there is any mucous problem still, add spices like cinnamon, cloves, or cardamom. Virtually no problem then.
And cold dairy products should be avoided especially in the winter.
Makes all the difference.