Experienced and professional animal trainer provide their insights in answering this question :
A. It can be connected with teeth root absces. X-ray exam of aral cavity should be done. Also denatal procedure with ultrasounds and maybe some extractions are necessary.

How to Identify Common Pet Problems ?

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

Most cases of Horner`s syndrome will resolve spontaneously, however for some dogs, the change will be permanent. It is important to treat any underlying disease.
Treatment and prognosis for horner`s syndrome in dogs

There is no known treatment for horner syndrome itself. The prognosis for idiopathic diseases is generally good with spontaneous improvement typically occurring within 8 weeks. Some animals only recover partially and recurrence is rare.

Horner`s syndrome is not painful and does not affect the dog`s vision, so treatment isn`t necessary. However, Horner`s syndrome indicates underlying nerve damage, and the cause may need addressing.
Sometimes, when a dog is not feeling well, is dehydrated or otherwise ill, both third eyelids might be elevated. The third eyelid can be elevated any time the eye is painful, from a corneal ulcer or glaucoma, or dry eye.
There`s no specific treatment for Horner syndrome. Often, Horner syndrome disappears when an underlying medical condition is effectively treated.
Horner`s syndrome, in most cases, will resolve itself. However, treatment of the underlying disease is essential. In cases of unidentifiable causes of Horner`s syndrome, natural recovery will usually recur within 16 weeks to 6 months.
Horner syndrome is a rare condition classically presenting with partial ptosis (drooping or falling of upper eyelid), miosis (constricted pupil), and facial anhidrosis (loss of sweating) due to a disruption in the sympathetic nerve supply.
If you notice your dog squinting or holding its eye closed, it could be a sign of a serious issue. The five most common reasons for a dog squinting in one eye are a corneal ulcer, glaucoma, anterior uveitis, dry eye and ocular foreign bodies.
There is no treatment for Horner syndrome itself. Ptosis is very mild and in rare cases affects vision in Horner syndrome. This can be corrected by cosmetic surgery or treated with eyedrops.
The gold standard test for Horner`s syndrome in all animals is the topical application of 1 drop of a 5% or 10% solution of cocaine (23). Cocaine prevents the reuptake of norepinephrine by the presynaptic membrane of the postganglionic neuron, leading to pupillary dilation (24).
Treatment varies depending on the cause. In some cases, a cause is never found. These are referred to as “idiopathic.” Sometimes the issue resolves on its own after several weeks.
Antibiotic and/or anti-inflammatory eye drops or ointment will be prescribed for 7-10 days. Oral medication will also usually be prescribed for 5-10 days. Rest is advised for the first 5-7 days. Swimming or bathing of the head area should be avoided for the first 14 days.
Horner syndrome is a constellation of findings with notable features of ipsilateral ptosis, miosis, and anhydrosis. The anisocoria is typically larger in dimly lit conditions. To confirm the diagnosis with pharmacological testing, the first step is to use apraclonidine 0.5% or cocaine eye drops in both eyes.
Horner syndrome may result from any one of a variety of factors, including carotid artery dissection; the development of a tumor in neck or chest cavity, particularly a neuroblastoma and a tumor of the upper part of the lung (Pancoast tumor); the development of a lesion in midbrain, brain stem, upper spinal cord, neck, …
Apraclonidine testing can easily confirm the diagnosis of Horner`s syndrome, but is unable to localize the lesion. Due to the long course of the oculosympathetic pathway from hypothalamus to the eye, there are multiple locations of potential pathology in Horner`s syndrome.
Acute onset of painful Horner`s should be considered a neurological emergency and subject should be evaluated for dissection of the internal carotid artery as described below. These patients are at increased risk for cerebral infarction.
Prolapsed gland of the third eyelid (nictitans) is often referred to as “cherry eye.” The gland is actually one of two tear glands positioned around each eye in dogs and cats. The prolapse occurs due to a weakness of the connective tissues that hold the gland in place.
A severe inner ear infection can spread to the part of the brain that controls your dog`s breathing and heart rate, although this is quite rare. Two potential long-term complications of inner ear infection include a permanently altered sense of balance and persistent signs of Horner`s syndrome.
The bacteria most commonly isolated from ear canals of dogs affected by otitis are Staphylococcus spp. (2). Other bacteria commonly associated with otitis include Pseudomonas, Proteus, Enterococcus, Streptococcus, and Corynebacterium.
A Reverse Horner`s syndrome, otherwise known as Pourfour du Petit, in theory, is the opposite, and comprises eyelid retraction, mydriasis and hyperhidrosis.
Horner syndrome results from disruption of the oculosympathetic pathways, and is associated with ptosis, miosis, and anhidrosis, although patients may not present with this complete triad. Although there are many causes of Horner syndrome, head, neck, and chest trauma can precipitate the syndrome.
The absence of an eye often escapes stranger`s notice at first glance. The dog will lose some depth of vision and you may notice a lack of accuracy when they`re chasing a ball. But in general having only one eye is tolerated well by dogs and they can enjoy a great quality of life.
Topical apraclonidine in the diagnosis of suspected Horner syndrome.
The presence of Horner syndrome implies interruption of the sympathetic fibers to the face that arise in the cervicothoracic ganglion. This interruption is due to a proximal lesion to the C8 and T1 roots that frequently is preganglionic, implying a root avulsion.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Hi after 4 days of our Sheltie being on Clindomycin for dental problem, she had Horners disorder in her right eye, it is gone away now
ANSWER : A. Glad to hear that your dog is feeling better and her symptoms are resolving. If you feel that the medication given may have adversely affected your dog, or that she was allergic to it, it is best to contact your local veterinarian. Your vet can help determine if the medication is the cause of the problem, and can also recommend a change in medication to alleviate the problem if she still needs to be taking antibiotics.

Horner’s Syndrome (a problem with the nerves of the eye and surrounding it) is often idiopathic, meaning the cause of it is unknown. However it will usually resolve on its own without treatment.

Read Full Q/A … : R

Q. Hi after 4 days of our Sheltie being on Clindomycin for dental problem, she had Horners disorder in her right eye, it is gone away now
ANSWER : A. It can be connected with teeth root absces. X-ray exam of aral cavity should be done. Also denatal procedure with ultrasounds and maybe some extractions are necessary.

Read Full Q/A … : R

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. One eye is more red than the other. Last night he was pawing at it,today, he isn’t. Should I bring him to the vet?
ANSWER : A. Sounds possible that he had some irritation to the eye that is at least not itchy anymore. You can do either, having it checked now to confirm mild irritation, potentially due to debris or a topical irritant to the eye; or you can flush the eye with sterile saline eye wash (over the counter) using care not to poke or prod the eye and see if the irritation goes away on its own within the next 24 hrs. It has shown improvement already it appears, however if it is not cleared up and your pet seems irritated by it AT ALL, then it should be looked at by a vet and tested for a possible corneal scratch or ulcer. These can cause redness of the eye, eye discharge and pawing at the face. They are usually treated by prescription only topical eye antibiotic ointment and generally do very well after treatment.

Read Full Q/A … : Eye Problems in Cats

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. I was told by my vet that my dogs cherry eye was caused by something hitting his eye when he was poking around under a bush. I was told surgery needed
ANSWER : A. Prolapsed gland of the eyelid refers to a pink mass protruding from the animal’s eyelid; it is also called a “cherry eye.” Normally, the gland is anchored by an attachment made up of fibrous material. The most common sign of “cherry eye” is an oval mass protruding from the dogs’s third eyelid. It can occur in one or both eyes, and may be accompanied by swelling and irritation. He may have acquired it by getting an injury to his eye but this isn’t the case sometimes. Sometimes there is a weakness in the fibrous attachment.

The veterinarian will review the mass in the dog’s third eyelid and determine if there is an underlying cause for the condition. The diagnosis of the prolapsed gland could be scrolled or everted cartilage in the third eyelid, abnormal cells in the third eye, or a prolapse of fat in the dog’s eye.

Treatment often includes surgical replacement of the gland in the dog’s eye, or removal of the entire gland if the condition is severe. Conversely, if medications are recommended, they are typically topical anti-inflammatory drugs that are effective in reducing swelling.

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 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.