Dog Tear Stains Cause. Consider bottled or distilled water as well water often has a higher mineral content states klein. Porphyrins are commonly called waste products from red blood cells containing iron. Causes of tear staining there are a number of reasons that could lead to tear staining in dogs.
Klein states that factors in a dog s environment can also cause tear stains. They are created in humans too.
For instance water that is high in iron may be a culprit.
Porphyrins are created during the normal cycle of biosynthesis of hemoglobin to create energy. The cause can be related to health issues shape of the eye blocked tear ducts puppy teething ear infection allergies either food or environmental and so on. Excess tearing is also your dog s response to irritation. In some cases it is simply because your dog s eyes are irritated by an ingrown eyelash an inverted eyelid or hair growing too close to the eye all painful but easily treatable conditions.
