Isla Bennett
If you've noticed that one or more of your dog's nails has turned black, there are several possible reasons. The most common cause is a bacterial or fungal infection, which can be picked up in various locations, including dog parks, sidewalks, and backyards. Other possible causes include trauma to the nail or toe, a detached nail, ageing, or symptoms of an allergy, growth, or tumour. In rare cases, it can indicate an autoimmune disease.
| Characteristics | Values |
|---|---|
| Infection | Bacterial or fungal |
| Trauma | Injury to the nail or toe |
| Detached nail | The nail is dying and will fall off |
| Ageing | Nails darken and thicken with age |
| Allergy | Symptoms of an allergic reaction |
| Growth | Could be a tumour |
| Autoimmune disease | Rare cases |
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What You'll Learn
Trauma to the nail or toe
If your dog has a bacterial or fungal infection, this can also turn the nail black. Infections are commonly picked up in dog parks, on the sidewalk, and in backyards. You may also notice that the nail looks misshapen or has dark spots on it. If your dog has an infection, your vet will prescribe a topical ointment. It is important to keep your dog from licking this, as it is not safe for them to ingest.
A damaged nail may start red, then go brown, purple, and black. This is often okay on its own, but if the cuticle separates from the nail bed, it can be painful for your dog. If you notice that your dog is uncomfortable or the nail looks like it is hanging on by a thread, you should take your dog to the vet. They will be able to help decide whether to take the nail off and wrap it to allow it to heal properly or to make another recommendation.
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Fungal or bacterial infection
A fungal or bacterial infection is one of the most common reasons for a dog's nail to turn black. These infections can be picked up in various locations, including dog parks, sidewalks, and backyards. When they set into an infection, the nail will turn black and may also look misshapen or have dark spots. Many dogs will favour a leg that isn't injured because their toe or foot will be itchy or painful. They will pick at it more, either by licking or scratching it. If caught early, it shouldn't spread past one or two toenails.
If you notice that your dog's nail has turned black and suspect an infection, it is important to take them to the vet. The vet may recommend a topical ointment to treat the infection. It is important to keep your dog from licking the ointment, as it is not safe for them to ingest. You can do this by covering the nail with wrapping.
In addition to infection, there are several other possible causes of a dog's nail turning black. Trauma to the nail or toe, a detached nail, aging, or symptoms of an allergy, growth, or tumour can all cause the nail to darken. In rare cases, it can also indicate an autoimmune disease.
As dogs get older, their nail colour will often darken, especially if they already have one or two black or beige nails. This is usually nothing to be alarmed about and your dog will not notice any change. However, if the nail becomes thickened or starts to separate from the nail bed, it can be painful for your dog.
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Ageing
As dogs get older, their nail colour will darken. This is especially likely if your dog has one or two black or beige nails to begin with. If your dog's nail turns black, it could be due to ageing, a fungal or bacterial infection, trauma to the nail or toe, a detached nail, symptoms of an allergy, growth or tumour, or, in rare cases, an autoimmune disease.
If your dog's nail has turned black due to ageing, it will often get thicker, too. Your dog won't notice any change and won't pick at it or otherwise pay attention to it. This is nothing to be alarmed about—it's like when your dog starts to go grey.
However, if your dog has an infection, you should apply a topical ointment. Keep your dog from licking this, as it's not safe for them to ingest. You can also cover the nail with wrapping. If the cuticle separates from the nail bed, it can be painful for your dog. If you notice that your dog is uncomfortable or the nail looks like it's hanging on by a thread, you should take your dog to the vet to help decide whether to take it off and wrap it to allow it to heal properly or to make another recommendation.
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Allergies, growths or tumours
If your dog's nail has turned black, it could be a sign of allergies, growths or tumours. However, there are several other common reasons for this, including trauma to the nail or toe, a detached nail, ageing, or bacterial and fungal infections.
In the case of allergies, growths or tumours, it is important to consult a veterinarian as soon as possible. They will be able to diagnose the specific cause of the black nail and recommend an appropriate course of treatment.
Allergies in dogs can be caused by a variety of factors, such as environmental allergens (e.g. pollen, dust mites, mould), food allergens (e.g. certain proteins or grains), or contact allergens (e.g. shampoo, flea treatments). If left untreated, allergies can lead to further complications, including skin infections and respiratory issues. Therefore, it is crucial to identify and address the underlying cause of the allergy to prevent future occurrences and alleviate your dog's discomfort.
Growths or tumours on a dog's nail can be benign or malignant. Benign growths, such as warts or cysts, are non-cancerous and typically do not require aggressive treatment. However, malignant tumours can be more serious and may require surgery, chemotherapy, or radiation therapy. It is important to note that early detection is key to successful treatment, so regular check-ups with your veterinarian are essential.
In the meantime, there are several steps you can take to support your dog's overall health and well-being. Ensure that their diet is balanced and nutritious, provide them with plenty of exercises and mental stimulation, and maintain a consistent grooming routine to keep their nails trimmed and their coat healthy. By taking a proactive approach to your dog's health, you can help them live a long and happy life, even in the face of potential health challenges.
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Autoimmune disease
In most cases, a dog's black nail is nothing to worry about. It could be due to a bacterial or fungal infection, trauma to the nail or toe, a detached nail, ageing, or symptoms of an allergy, growth, or tumour. However, in rare cases, it can indicate an autoimmune disease.
An autoimmune disease is a condition in which the immune system mistakenly attacks the body's own healthy cells, tissues, and organs. In the case of a dog's nail turning black, it could be a sign of an autoimmune disease that is affecting the nail bed or the surrounding tissue. Autoimmune diseases can cause inflammation and damage to the affected area, which could lead to changes in nail colour and texture.
There are many different types of autoimmune diseases that can affect dogs, including rheumatoid arthritis, systemic lupus erythematosus, and inflammatory bowel disease. These diseases can cause a variety of symptoms, including joint pain, skin rashes, weight loss, and gastrointestinal issues.
If you suspect that your dog may have an autoimmune disease, it is important to consult your veterinarian. They will be able to perform a thorough examination and run diagnostic tests to determine the underlying cause of your dog's symptoms. Treatment for autoimmune diseases typically involves immunosuppressive medications to help control the overactive immune response. Early diagnosis and treatment are crucial to managing the disease and preventing further damage to the body.
While a black nail on a dog is usually not a cause for concern, it is always a good idea to monitor your dog's nails and overall health. If you notice any changes or unusual symptoms, it is best to consult your veterinarian to rule out any potential health issues.
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Frequently asked questions
There are a few common reasons for a dog's nail to turn black, including a fungal or bacterial infection, trauma to the nail or toe, a detached nail, ageing, or symptoms of an allergy, growth or tumour.
If your dog's nail has turned black, you should take them to the vet. The vet will be able to advise on the best course of action, which may include removing the nail and wrapping it to allow it to heal properly.
In some cases, a black nail may be treated at home by keeping it covered with wrapping. However, it is always best to consult a vet first to ensure your dog receives the proper care.
