spilt milk

I started giving Eddie whole milk on his 13 month bday, now almost a month ago. He drinks it from his silver cup with his meals. He doesn't chug it as ferociously as he does his water, he sips it slowly, still trying to figure out what this white stuff that isn't from mommy is. But he does drink small amounts of it. The most annoying part about having him drink milk instead of water all the time is that when it spills, it has to be cleaned up thoroughly otherwise it will smell. We had a dishtowel in the laundry room that reeked like puke and we figured out it must have been used to clean up spilt milk. I was hesitant to give Eddie milk, thinking, why does he need it if he is still breastfeeding? We are the only creature to drink another species' milk. And over 70% of Americans have some form of lactose intolerance. But since he is so lightweight, only in the 25% for his age, I decided that maybe the whole milk instead of water would bulk him up...and help him sleep through the night. Well, he seems like he weighs a tad more but he is still not sleeping through the night. More teeth are exploding in the mouth - so many that I cannot even keep track of which ones they are. So I am hoping that the night waking will get better soon.