hello! my puppy Delilah is a 14-week Morkie puppy. We got her about 3 weeks ago and she has had kennel cough symptoms and has been put on antibiotics. She also had a chest x-ray and found that her trachea was very small. Is a small trachea common for a 2.5 pound puppy. My vet is concerned about this and I don't know what to do.