How much milk?

changingnames

My 18 month old is nursing 2-4 times a day. How much additional/supplemental milk do I need to offer him? He eats a wide variety and hefty amount of food. Is it ok to use coconut or almond milk insteadof dairy? What are the pros and cons of doing so assuming he is not allergic to any of the milks. He will drink cow, goat, coconut, or almond happily. We buy organic and usually get the cream top/non homemgenized variety but I'm still a little wary of dairy.