Goat milk is mild and light, works as a mild laxative, is wet for dry bodies and helps cure mouth cankers, dry cough and epistaxis (nosebleeds).
Milk in general is the most beneficial drink for the body due to its nutritional value and closeness to the nature of the body and to the childhood of mankind. In the Sahihain it is narrated;
"The night of the Isr'aa”" (the Prophet's journey from Mecca to Jerusalem and then to heaven), the Messenger of Allah b was given two cups, one containing milk and the other wine. The Prophet is, looked at them and then took the cup of milk. Gabriel said, "You have accepted what is natural, (True Religion i.e. Islam) and if you had taken the wine, your followers would have gone astray."
Sour goat milk is not digested quickly and produces unfavorable mixtures. The hot tempered stomach benefits from goat milk, though, and easily digests it. :
Cow Milk