Experienced and professional animal trainer provide their insights in answering this question :
A. It’s kind of unlikely that an infection in the gums is causing brown drainage in the eyes. There is a substance called porphyrin that’s in both tears and saliva. When white dogs like Bichons have excessive tearing, their fur is often stained under their eyes. You’ll see the same thing if they lick themselves excessively.

As far as the tear staining goes sometimes it’s effective to try to open up the tear ducts with a canula (a hollow needle) while under anesthesia. This prevents the tears from spilling onto the fur. There’s also a product called Angel Eyes that contains low doses of the antibiotic metronidazole, and for some reason that seems to decrease tear staining as well.

As for the chewing you need to talk to your vet about why he’s chewing – he may have fleas, mites/mange, or allergies.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Have you ever noticed how many dogs have reddish brown staining of their fur? It occurs most commonly where tears moisten the fur around the dog`s eyes or around their mouth where saliva wets their fur as well as where they lick their feet and forelegs.
The red/brown discoloration in tears comes from porphyrin. Porphyrins are iron containing molecules produced when the body breaks down iron. Porphyrins are excreted through the gastrointestinal tract, urine, saliva, and TEARS!
Contact lens solution can be used to clean around the eyes—not in the eyes! The boric acid in the contact lens solution oxidizes the iron in the porphyrins and may lighten the staining. After washing the face, always dry the area with a clean towel to prevent ulcerative dermatitis secondary to wet skin.
Another popular home remedy for removing brown discoloration is hydrogen peroxide. Simply apply it to the afflicted areas and leave them for a few minutes before washing off. You may also try combining it with baking soda to make a paste, which can be applied to the stains and allowed to dry before being wiped away.
Discolored saliva from your dog can be indicative of an infection, bad tooth, growth in his mouth, or some other type of abnormality. If your dog`s saliva has color to it, you should get him evaluated by your veterinarian as soon as possible.
Porphyrins are excreted from tears, saliva, urine, and feces and are high in iron. “Iron is the nasty ingredient that especially stains white fur,” he says. This is why you often see discoloration around your dog`s eyes, mouth, licked fur, or even their rear end.
In most cases, a combination of genetic and environmental factors trigger porphyria symptoms. There is no cure for porphyria, but by avoiding triggers, development of symptoms of porphyria can be prevented. Treatments are available to manage the symptoms.
The staining you are referring to is most likely caused by a substance called Porphyrin. Porphyrin is a naturally occurring substance in the tears and saliva and tends to show up as a pink/brown colour where your pet has licked, dribbled or produced lots of tears.
Flush eyes with an appropriate canine eye-wash, such as saline eye-wash solutions or Terra Septic eye drops. Use an eye wash wipe and rub underneath and around the eye area.
Pour a generous amount of vinegar directly onto the pet stain. Be sure to thoroughly soak the stain. Next, pour a much smaller amount of baking soda onto the stain (be sure to follow this order). You`ll hear the solution working its magic right away!
What is pyoderma? Pyoderma is defined as a bacterial skin infection. Pyoderma may also be referred to as impetigo, especially in young puppies.
Mix one part hydrogen peroxide with 10 parts water. Boil one tablespoon of boric acid powder in one cup of distilled water (keep refrigerated). Contact lens solution includes boric acid that oxidizes the iron in porphyrins and could help to lighten stains (but DO NOT use in the eyes).
Stomatitis, also known as canine chronic ulcerative stomatitis (CCUS), affects a dog`s gums, oral mucosa, tongue, and pharynx. It is known as a paradental disease because it does not attack the tissues that attach the tooth to the socket, it attacks the tissues that surround the teeth.
Tetracycline is another antibiotic that has proven to be an effective treatment for tear staining, as it works via a number of mechanisms. Tetracycline biochemically breaks down the hydrostatic bonds in the dog`s tears, making the tears thinner and thereby better able to drain through the dog`s tiny tear ducts.
Foreign bodies in the eye – Small irritants like dirt, dust, and grass seeds can get lodged in the eye and cause an eye infection if they are not removed promptly. Allergies – Allergies such as pollens, moulds, and other environmental irritants can cause eye inflammation which can lead to eye infections.
The terms porphyrin and porphyria are derived from the Greek word porphyrus, meaning purple. Urine from porphyria patients may be dark or reddish in color due to the presence of excess porphyrins and related substances, and may darken further after exposure to light.
Hereditary coproporphyria (HCP) is a rare inherited form of liver (hepatic) porphyria, characterized by neurological symptoms in the form of episodes (acute attacks) of stomach pain, nausea, vomiting, weakness, numbness, and pain in the hands and feet (neuropathy).
Propionibacterium acnes (P. acnes), a Gram-positive anaerobic bacterium, is a commensal organism in human skin. Like human cells, the bacteria produce porphyrins, which exhibit fluorescence properties and make bacteria visible with a Wood`s lamp.
These symptoms generally occur suddenly and usually last a short period of time. Symptoms of acute porphyrias include: Pain in the abdomen, chest, arms, legs, or back. Nausea or vomiting.
Porphyria is a group of liver disorders in which substances called porphyrins build up in the body, negatively affecting the skin or nervous system. The types that affect the nervous system are also known as acute porphyria, as symptoms are rapid in onset and short in duration.
This is because chicken meat contains a pigment called porphyrin, which can build up in the dog`s tears and cause staining. Other foods that contain porphyrin include liver, beef, and pork. If your dog is prone to tear stains, you may want to avoid feeding them, or reduce the amount you feed them these foods.
Antibiotics will be prescribed to control the infection and either an anti-inflammatory and/or pain relief medication will also be prescribed. Although this medical treatment will deal with the symptoms, it will not treat the underlying tooth injury and antibiotics alone will not cure a tooth root abscess.
Cocoa is made up of some of the world`s toughest stains. It is essentially made from chocolate, which by itself is already a big culprit for dark stains. Apart from this, the drink also proves to be a tough stain to remove because it has the strong combination of proteins, fat, and sugar.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Infection in gums causing Brown drainage from eyes and stained fur where ever he bites. Antibiotics were used to clear it up a year ago.
ANSWER : A. It’s kind of unlikely that an infection in the gums is causing brown drainage in the eyes. There is a substance called porphyrin that’s in both tears and saliva. When white dogs like Bichons have excessive tearing, their fur is often stained under their eyes. You’ll see the same thing if they lick themselves excessively.

As far as the tear staining goes sometimes it’s effective to try to open up the tear ducts with a canula (a hollow needle) while under anesthesia. This prevents the tears from spilling onto the fur. There’s also a product called Angel Eyes that contains low doses of the antibiotic metronidazole, and for some reason that seems to decrease tear staining as well.

As for the chewing you need to talk to your vet about why he’s chewing – he may have fleas, mites/mange, or allergies.

Q. What can be given to dogs to stop the brown draining around dogs eyes? I was told tetracycline would work.
Thanks
ANSWER : A. Eye leakage is normal in some breeds of dogs, especially those that are more “bug-eyed” types. This eye leakage is just normal tears coming from the eye which can stain lighter colored coats. Unless there is an infection it does not need to be treated with antibiotics. Signs of infection usually include drainage that is thick or goopy and is yellow or greenish in color. Dogs with infections may also want to keep the eye closed, or may paw and scratch at it.

For plain tear-staining. Tear-stain wipes can be used around the eyes to remove the stain and bring the coat back to natural color. If infection is suspected, it is best to have your vet take a look at the eye prior to placing any medications in it.

Q. Weak, discharge from eyes, swelling on right eye, does not want to open eyes. What is wrong?
ANSWER : A. If the discharge from the eye is green or yellow in color, it can indicate a secondary infection. Swollen eyes can be caused by a number of things ranging from allergies to infections, to injury to the eye itself or surrounding areas.

It is best to have your pet’s eye examined by your local vet. They will most likely wish to place a stain in the eye that can check for damage such as cuts or scratches. An ointment can then be given to help reduce inflammation, pain and take care of infection.

Until you can get to the vet, be sure to not let your pet scratch or paw at their eye as this can make things worse. You can also use a warm wet washcloth to gently remove any debris and allow the eye to open some, providing relief. However, if symptoms worsen, or the swelling travels to the face, head or neck, it may indicate a serious allergic reaction which should be treated immediately.

Q. My pet is suffering eyes discharge, what should I do?
ANSWER : A. Mucus, yellow-green pus, or a watery eye discharge can all be signs of conjunctivitis, which is inflammation of the lining of your dog’s eye.

There is a wide range of causes for conjunctivitis, from allergies, injury, birth defects, and tear duct problems, to foreign bodies, dry eye syndrome, infections or even tumors.

Other signs of conjunctivitis include excessive blinking or keeping the eye closed, squinting and pawing at the eyes.

Treatment of this condition depends on the underlying cause. In most of the cases cleaning, soothing the eye and applying antibiotics eye drops suffice but is some instances further investigation is required to establish the cause of the excessive eye discharge, and this should be performed by a veterinarian.

Q. One of my pet’s ears seems very irritated. What I can use to clean it with?
ANSWER : A. Ear Irritation can be caused by a number of things ranging from allergies, ear infections or even mites. Dirty ears can also cause irritation and problems. Knowing the type of problem is best for figuring out how to treat it.

For plain dirty ears that do not have any odor, redness or leakage of discharge/debris, a simple over the counter canine ear cleaner can be used. Gently soak some cotton balls or a washcloth with the cleaner, and then use these to wipe out the flap of the ear and opening to the ear. Do NOT use Q-tips as these can become stuck or lodged in the curve of the ear canal and may cause injury to the ear drum.

If the ear is bright red or itchy without any dirt or debris in it, it may indicate an allergy. Sometimes an allergy medication can help provide relief in this situation. Your vet can give you the correct dosages of an over the counter allergy medication to use, or may recommend one specifically for dogs.

For infections and mites, changes to the ear such as bad smell or lots of debris and discharge, flecks of black or brown debris, or scabs and sores in the ear may be present. In these cases, it is best to have your vet take a sample of the ear debris to test for mites or infection. Your vet can then give you an ointment that is placed and left in the ear between ear cleanings. Most vets will then recommend cleaning the ears twice daily and then leaving in the ointment after for a period of ten days.

Ear mites ARE contagious to other pets, so if your dog does have them, it is best to treat any other pets in the house at the same time to prevent the mites from spreading around continuously.

Q. My cat is excessively scrstching herself., to the point she has sores. She is strictly an indoor cat. Did have flees been treated for 2 months
ANSWER : A. For every flea you see on your pet, there are 100 more in the environment. Get your pet on a good topical or oral flea control through your vet. In flea control, you get what you pay for. Consider asking your vet for a dose of Capstar. It helps get the problem under control by killing the fleas on the pet starting in five minutes but only lasts for 24 hours.

You need to treat your home environment. If you use a pest control service, tell them you are having a flea problem and they can adjust their treatment. Use a premise spray that also contains an IGR, insect growth regulator. This keeps eggs and larvae from maturing into adults and helps break the life cycle. Also, vacuum EVERY DAY, throwing out the bag or emptying the canister every time into an outside receptacle and spraying the contents with insecticide to kill the fleas you’ve vacuumed up.

Treat your yard too, since fleas are opportunistic and will hop a ride into your home on your pant leg without you knowing it. Concentrate on areas under bushes, in the shade. Fleas are less likely to be located in open sunny areas where it gets hot.

If chemicals are a problem, you can use borax. Sprinkle it into rugs, into corners and under furniture, use a broom to work it into the fibers and let it sit for hours, days even. It won’t hurt you or your pet to have it present. Then vacuum it up, reapply as needed. Food grade diatomaceous earth can be gotten from a health food store and worked into the rugs and corners in the same way as borax. These treatments aren’t as fast and effective as chemical insecticides but they can help.

You might want to consider boarding your pet for the day at your vet, to give you the opportunity to flea bomb your house without having to worry about your pet being exposed. They can bathe your pet and give a dose of Capstar while you treat your home.

Be patient, you may have to repeat these steps multiple times 10-14 days apart to help break the flea life cycle.

Skin problems can have a variety of causes, sometimes more than one. It is important to have the problem checked by your vet to determine if there is a medical cause for your pet’s skin issues and treat accordingly.

In pets of all ages, fleas, food allergies and exposure to chemical irritants such as cleaners and soaps can be a cause. Any one of these may not be enough to trigger the breakouts, depending on how sensitive your pet is, but a combination can be enough to start the itch-scratch cycle. Finding out the cause and eliminating it is the best course of action. With flea allergies, if your pet is sensitive enough, a single bite can cause them to break out scratch enough to tear their skin.

Check for fleas with a flea comb. Look for fleas and/or tiny black granules, like coarse black pepper. This is flea feces, consisting of digested, dried blood. You may find tiny white particles, like salt, which are the flea eggs. Applying a good topical monthly flea treatment and aggressively treating your house and yard will help break the flea life cycle.

If you use plastic bowls, this is a possible cause for hair loss, though this tends to be on the chin, where their skin touches the bowl while they eat. If you suspect this to be the culprit, try changing the bowls to glass, metal or ceramic.

Food allergies are often caused by sensitivity to a protein in the food. Hill’s Science Diet offers some non-prescription options for sensitive skin as well as prescription hypoallergenic foods for more severe cases. Royal Canin carries limited protein diets that may also offer some relief. Your vet can recommend a specific diet that will help.

If there is no relief or not enough, consider getting your pet checked by a veterinary dermatologist and having allergy testing done.

Q. My cat has entropion of the eyes. Vet did surgery on both eyes, the right eye seems ok but the left eye is still running/mucus. Can I use Neosporin?
ANSWER : A. Do NOT use Neosporin on cats or dogs as this product can be toxic to pets if ingested. If the eye is still leaking or has green or yellow discharge it is best to contact your veterinarian. Green or yellow discharge can indicate that a secondary infection has formed and may require antibiotics or cat-safe ointments to help clear it up. In the meantime, you can use a warm wet washcloth to remove any excess debris from the eye very gently, allowing the eye to open and help with healing.

Q. My dog got into a fight with a cat. I think the cat scratch her eye. I clean it out with water. I have gentak can I put that in there?
ANSWER : A. It is best NOT to place anything in the eye unless specifically instructed to do so by your vet as it can cause more damage to the eye. As cat scratches and bites can easily become infected and the eye is a very sensitive area, it is best to schedule a veterinary appointment as soon as possible to have the eye examined. Your vet can place a fluorescent stain in the eye to check the extent of the damage and can then give you a pet-safe medication to place in it as needed to help it heal. Until you can get to the vet, it is best to keep the eye clean of debris and discharge with a warm wet washcloth, and to prevent your dog from scratching or clawing at the eye with the use of an Elizabethan (cone) collar.