Just like with humans, snoring in dogs generally occurs when air movement is restricted in the nasal passageways or throat. Some of what can cause dogs to snore may simply be that they like to sleep on their back.

Dogs bark for all kinds of reasons. ... Barking might be a response to a howl heard from half a mile away. Or because a squirrel just chattered in the backyard. Or because your dog wants dinner!

Constant sneezing in dogs is a sign of nasal irritation, which can indicate the onset of an infection or just be the result of a multitude of scents in the air, according to WebMD. However, if mucus accompanies violent sneezing, the dog needs to be checked out by a veterinarian.

These problems arise very often, but usually for a limited period of time, probably due to hormones' changes.

Allergies are a leading cause of dry dog noses. ... Plastic is a common dog allergy that can cause a dry, crusty dog nose. If your dog has a plastic dish for food or water switch it out for a stainless steel bowl. Certain dog foods, treats and household products can also spark your dog's allergies.

Dogs bark at nearly everything - every dog is different though. This could be due to loneliness, or the dog may have heard something. Anything that sounds or smells familiar can set off a dog to bark.

Some dogs shiver from anxiety. Blood sugar levels as well. Weather factors in this too.

This could be due to fear, anxiety, or a number of other things. It also could be due to his past, if he was ever abused mentally, physically, or emotionally. Dogs tend to have the same emotions as we do.

It's also possible that a dog eats rocks because of an underlying medical condition. These can include intestinal tract disorders, nutritional deficiency, diabetes, or other illnesses. Rule those out - and it could be something your dog did as a puppy, and was never told not to do it!