I would start with talking to your veterinarian about causes - some dogs naturally have dry noses and this may be normal. If you see cracks that are causing pain or bleeding, this needs to be addressed by your veterinarian.
Usually it means he is not well. Dog's noses should usually be wet or at the very least slightly moist. Check he is eating and drinking adequately first. If his nose is still dry to the point of being cracked then you should take him to the vet.
A dog's nose that is dry and flaky could be a sign of allergies, or sensitivity to something in the dogs surroundings. A vet will be able to determine what is bothering the dog.
Your dogs nose is dry probley because of the weather or if she/hes has been laying down nothing to worry about in less is been over 11 days
Possibly nothing - a dry nose does not mean your dog is sick.
Yes, provided the nose isn't cracked or bleeding.
no.
It is not a sign of pregnancy among dogs. A dry nose can mean dehydration though. Ask a vet for more detail. Also it is in Dogs for Dummies (although the book is not actually for dummies).
Anything or nothing. Take the dog to a vet.
No; some dogs naturally have dry noses and your dog may be perfectly healthy.
When they pant they get a wet nose, when they have a drink or lick their nose it gets wet. There is the old myth that if a dog's nose is dry it is sick I have one thing to say about this, FALSE! If a dog's nose is dry they are healthy don't worry if it is dry.
Dogs and cats noses can be dry or moist. If there are no other signs of illness it is perfectly normal.
A dogs nose is usually always wet which means it is healthy, if it is dry that means it is sick or has a cold.