Not only can your dog sense when you have a cold, but domestic dogs have shown an aptitude for detecting both much smaller mood fluctuations and far more serious physical conditions.
Drinking milk does not increase mucus production and, therefore, there's no truth to the old wives' tale that you shouldn't drink milk when you have a cold.
It means to breathe in air through your nose in a way that makes a sound, especially if your nose is running (like if you are crying or if you have a cold or allergies) .