My son is six weeks old, when he was two weeks old I took him to the doctor because he seemed stuffed up. They checked him out and gave him a clean bill of health - saying his nostrils are small and the smallest fuzz will cause him to seem stuffy. After four weeks and their recommendations of a humidifier and salt water nasal drops, he is still stuffy. He is the most stuffy in the middle of the night. We have two cats and a dog. Has any one had this problem? I am concerned he might be allergic to the animals, and if so want to remedy the situation ASAP. Any help or advice??