I started giving DS cow's milk at 1 week after he turned 11 months for several reasons. Anyhow, he's been super, super congested the past few weeks. His nose isn't really runny, but his nostrils are crusty and I keep having to mist his nose and he has tons of chest congestion that won't come out. I'm just wondering if it's related to introducing cows milk...someone said to me the other day their daughter got sick a ton after she weaned and introduced cows milk...so just wondering!