All dogs will have some discharge at the corners of their eyes. It's perfectly normal to need to clean a bit of light gray matter from their eyes once or twice a day. But owners take note: if the color of the discharge is yellow or green, or if buildup appears frequently, you should consider asking your veterinarian to test your dog for dry eye.

The skin serves to protect the rest of the body. It is a barrier to infection, dehydration, ultraviolet light, irritating and caustic substances.

Vomiting is a very common problem in dogs and cats. There are many causes of vomiting.