Dog owners adore our furry friends’ vibrant and healthy coats — but when a dog’s fur starts to change color, it can be a cause of concern. Whether it is a general color change or patches that crop up, dog fur discoloration leaves many pet owners wondering about the cause.
Penny Paws Animal Clinic, the most trusted and reliable DeSoto vet clinic for dog owners across our part of Texas, discusses some of the factors that lead to changing fur colors and whether owners should seek veterinary advice.
Genetic Factors and Their Role in Fur Discoloration
Genetics are a primary cause of dog fur discoloration. Every dog’s coat color and pattern result from the genes it inherits from its parents.
The genes influence the production of pigments called eumelanin, which produces black fur, and pheomelanin, which produces red, yellow, and brown gradients. Canine pigments in the skin determine the color of hair that grows from that area.
Some breeds are genetically predisposed to fur coloration changes due to genetic factors. For example, Dalmatians can inherit Dalmatian Bronzing Syndrome, which causes black spots to turn brown. Miniature Schnauzers are more prone to hyperpigmentation, which causes dark fur patches to develop as they age.
The Aging Process and Fur Discoloration
Of course, caring for dogs changes as they age, and hair color changes occur with aging in dogs much as they do in humans. The aging process leads to decreased melanin production, which causes hair to turn gray or white, especially around the muzzle and eyes.
Depending on the breed, some dogs experience gradual graying beginning around six to eight years of age. Individuals can experience much earlier or more rapid graying or may never develop gray hair at all.
Sun Exposure and Environmental Factors
Environmental factors like sun exposure can significantly contribute to dog fur discoloration. Prolonged exposure to the sun’s UV light radiation can break down melanin in fur. Sun exposure can also fade or lighten the coats of light-colored dogs. Of course, this type of fading is most common in summer.
Some chemicals or pollutants can lead to dog fur discoloration. Swimming in chlorinated pools or harsh shampoos can alter a dog’s fur color or texture.
Nutritional Deficiencies and Their Impact on Coat Color
A nutritional deficiency can independently cause dog fur discoloration. Your dog’s diet directly affects the health and appearance of their coat. A lack of essential vitamins, minerals, and amino acids can cause a dog’s fur to dull, become dry, and sometimes change color.
Deficiencies in zinc, copper, or essential fatty acids can cause pigmentation loss. For example, a zinc deficiency can cause a specific form of dermatitis that causes hair loss, skin scaling, and fur discoloration — especially around the face and legs. Insufficient copper can cause a coat to fade or lose its gloss and shine.
Hormonal Changes and Their Effect on Fur Color
Hormonal changes often contribute to dog fur discoloration. Hormonal conditions, including hypothyroidism, Cushing’s disease, and adrenal gland disorders, can lead to coat color changes, thinning fur, and significant skin issues.
For example, hypothyroidism occurs when the thyroid gland does not produce enough hormones. One of the symptoms is a dull and thinning coat, sometimes accompanied by patches of fur fading or turning lighter. Cushing’s disease causes excess cortisol production. Among other symptoms, Cushing’s disease can cause patchy fur loss and changing coat colors.
Veterinary diagnostic tests determine whether hormonal imbalances cause abnormal fur conditions and color changes.
Health Conditions That Cause Fur Discoloration
Other than the hormonal changes described above, several general health conditions can cause dog fur discoloration.
Chronic diseases, infections, and allergic skin reactions are all proven causes of changes in coat texture and coloration.
Frequent licking and scratching due to allergic reactions can cause fur staining. A dog’s saliva contains porphyrins, which cause hair to turn reddish-brown, especially on and around the paws and face.
Likewise, yeast infections often crop up in areas that retain moisture, such as the paws and mouth. These infections often cause reddish or brownish hair discoloration. Yeast infections typically also involve excessive itching, redness, and foul odors. They require prompt veterinary treatment.
Preventing and Treating Fur Discoloration in Dogs
Consider these steps to maintain your dog’s healthy coat and prevent dog fur discoloration.
Balanced Diet
Feed your dog a diet rich in essential vitamins, minerals, and nutrients, such as zinc, copper, and omega-3 fatty acids. Nutritional supplements may be beneficial for dogs prone to coat issues.
Proper Grooming
Regular grooming and bathing with gentle, dog-friendly products can help remove dirt and pollutants that may cause discoloration. Brushing frequently helps distribute natural oils that nourish the coat.
Sun Protection
Limit your dog’s exposure to the sun during peak hours. If your dog spends a lot of time outdoors, consider using dog-safe sunscreens.
Regular Vet Visits
Routine veterinary checkups are essential for early detection of health issues that could affect your dog’s coat. Your vet can help diagnose underlying conditions, such as hormonal changes, and recommend appropriate treatments.
Targeted Treatments
If your dog’s fur has already started to discolor due to health or nutritional issues, targeted treatments may help. These can include dietary adjustments, medicated shampoos, and supplements designed to improve coat health.
By following these steps, you can help your dog maintain a colorful and healthy coat while addressing many of the underlying causes of fur discoloration.
When To Seek Veterinary Care from Penny Paws Animal Clinic
As discussed above, some dog fur discoloration is completely normal as a function of aging, sun exposure, or other natural processes.
However, if you see dramatic changes that involve rapid discoloration, patchy hair loss, excessive itching or licking, or irritated, bad-smelling skin, it’s time to schedule a visit to one of Penny Paws Animal Clinic’s six Texas locations.
We treat concerns like dog fur discoloration, unexplained dog weight loss, and other illnesses, along with routine care and vaccinations.
Visit our contact page to locate the clinic closest to you to schedule an appointment or call us at (469) 807-3030. Learn more now.