My LO sleeps w/ her mouth open. I've googled this and read that it's because their nose is obstructed with snot I guess because of a cold. The thing is, my little one doesn't have a cold or anything in her nose, boogers, snot, etc. She's 3 weeks old. My lactation consultant told me its unusual for babies to sleep with their mouth open which made me realize that ms exactly what my LO does and I've been trying to read up on it. Just wondering if anyone else's LO does this and what you may know about it. Thanks.