
Dogs' nails are very similar to human nails, but they are attached to the end of their phalanges or toe bones. Toenails are essential to a dog's health, helping them to dig, hold chew toys, run, and scratch itches. Toenail injuries can be very painful and may prevent dogs from participating in everyday activities. Nails can get injured during play or exercise, or when they are incorrectly trimmed. Nails that are too long are more prone to splitting and breaking, and long nails can also curl back and cut into the paw pad. Poor nutrition can also cause nails to split, so it's important to feed your dog a high-quality diet with the right nutrients, including biotin, zinc, and fatty acids. Consistent nail maintenance is key to preventing splits, so it's important to trim your dog's nails regularly, using sharp, good-quality nail clippers designed for dogs.
| Characteristics | Values |
|---|---|
| Cause | Physical trauma, incorrect trimming, underlying health condition, bacterial or fungal nail infections, ingrown nails, environmental allergies, food allergies, poor nutrition, dry weather conditions, rough surfaces, overgrown nails, nail disorders, age, genetics |
| Symptoms | Pain, bleeding, licking or chewing of nails, limping, discolouration, swelling, tenderness |
| Treatment | Restrain and muzzle dog, apply pressure with a towel or gauze, use cauterizing/styptic powder, trim away slivers, veterinary treatment, sedation, pain medication, antibiotic ointment or powder, bandage, oral antibiotics |
| Prevention | Regular nail trimming, proper diet and nutrition, nail grinding, walking on concrete surfaces, nail maintenance, sharp nail clippers, high-quality dog food, supplements (biotin, collagen, vitamins, fatty acids, zinc) |
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What You'll Learn
- Poor nutrition, including a lack of biotin, can cause nail splitting
- Long nails are more prone to splitting, so regular trimming is important
- Nails can split due to friction on rough surfaces like concrete
- Inappropriate nail clippers or trimming technique can cause splitting
- Underlying health conditions, like bacterial or fungal infections, can be a cause

Poor nutrition, including a lack of biotin, can cause nail splitting
Poor nutrition can be a reason for your dog's nail splitting. A well-balanced diet is essential for your dog's overall health and well-being. Dogs require a healthy balance of nutrients in their diet, and a lack of certain vitamins can lead to nail splitting.
Biotin, also known as vitamin B7 or vitamin H, is an essential nutrient for dogs. It is a water-soluble vitamin, which means it needs to be replenished regularly through diet. Biotin is necessary for the metabolism of fats, carbohydrates, and proteins and plays a crucial role in maintaining healthy skin, a shiny coat, and nails. It helps strengthen nails, making them less prone to breakage and damage.
A biotin deficiency in dogs can lead to several health issues, including weak nails. Dogs with a biotin deficiency may experience dry, flaky skin, rashes, skin lesions, scaly skin, dull coats, thinning hair, and hair loss. It can also cause digestive problems, such as vomiting, diarrhea, constipation, bloating, and loss of appetite.
To address a biotin deficiency, you can add biotin-rich foods to your dog's diet or give them biotin supplements. Natural sources of biotin include liver, egg yolks, kidneys, and other organs from beef, pork, lamb, or poultry. Additionally, eggs, nuts, seeds, and certain vegetables like sweet potatoes and spinach are good sources of biotin. Consult with your veterinarian to determine the right dosage and select the appropriate biotin supplement for your dog.
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Long nails are more prone to splitting, so regular trimming is important
Walking on split nails or nails that are too long can be very painful for dogs, and they may limp in pain, bleed, or lick and chew their damaged nails. Split nails can also disrupt a dog's coordination and interfere with walks and play. Nails that are not properly trimmed can also grow into the foot, becoming ingrown nails, which can lead to secondary infections, lameness, and pain when walking.
To prevent nails from splitting, it is important to keep them properly trimmed at an appropriate length. This can be done by clipping them regularly, either at home or by a professional groomer or veterinarian. Trimming should be done carefully, using sharp nail clippers designed for dogs, to avoid crushing the nail and causing uneven edges and potential splits. Nails can also be filed or ground down with a Dremel rotating nail grinder to smooth and finish the nails.
In addition to trimming, maintaining a balanced and nutritious diet is important for nail health. Nutrient deficiencies, such as insufficient biotin, zinc, or fatty acids, can weaken nails and make them more susceptible to splitting. Including foods rich in these nutrients, such as liver, kidneys, and other organs from beef, pork, or lamb, can help strengthen nails and prevent splitting.
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Nails can split due to friction on rough surfaces like concrete
To prevent nail splits caused by friction on rough surfaces, it is important to trim your dog's nails regularly. Long nails are more prone to breaking and splitting than neatly trimmed, short nails. Regular nail trimming helps to prevent overgrowth, which can also lead to nail cracks. Additionally, you can encourage your dog to exercise on softer surfaces like grass or dirt, reducing the impact on their nails.
Another way to prevent nail splits is to provide adequate hydration. Insufficient hydration can cause nails to become dry and brittle, making them more susceptible to injuries and bacterial infections. By ensuring your dog has access to ample water, you can contribute to maintaining the flexibility and strength of their nails.
In some cases, nail splits may be due to underlying health conditions or nail disorders. Bacterial infections, fungal nail infections, and ingrown nails can all contribute to nail breakage. If you suspect your dog has a medical condition affecting their nails, it is important to consult your veterinarian for diagnosis and treatment.
Additionally, nutritional deficiencies can play a role in nail health. A diet rich in animal-source protein, such as eggs, meat, fish, and dairy products, can support nail health. Supplements such as biotin (Vitamin B7) and collagen can also help strengthen nails and improve overall nail health.
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Inappropriate nail clippers or trimming technique can cause splitting
Inappropriate nail clippers or trimming techniques can cause nail splitting in dogs. It is important to use high-quality, sharp nail clippers designed for dogs. Dull clippers can crush the nail, leading to uneven edges and potential splits. Clippers that are not suitable for your dog's size and nail thickness may also cause similar issues.
One way to avoid this is to use a nail grinder instead of clippers. Grinders allow for precise filing, reducing the risk of trauma to the nails. If your dog is unfamiliar with the grinder, introduce it gradually, rewarding positive behaviour to create a positive association.
In addition to using the right tools, it is crucial to trim your dog's nails correctly. Be cautious not to cut into the quick, as this can cause pain and increase the likelihood of splits. The quick is an open blood vessel in the centre of the nail that contains blood vessels and nerves. Broken toenails that damage the quick can lead to bleeding that can be challenging to stop.
If you are not confident about trimming your dog's nails, it is best to leave it to a professional groomer or your veterinarian. They can also provide you with a quick lesson on proper nail trimming techniques.
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Underlying health conditions, like bacterial or fungal infections, can be a cause
While nail splitting in dogs can be caused by physical trauma during play or incorrect trimming, it can also indicate an underlying health condition that may require veterinary treatment. Underlying health conditions, like bacterial or fungal infections, can be a cause of nail splitting in dogs.
Bacterial infections can develop in your dog's nail beds due to various factors, including environmental and food allergies. These infections can cause nail splitting and other issues. Fungal nail infections, such as onychomycosis, can also lead to nail splitting. Ringworm or dermatophyte fungus are common causes of fungal nail infections in dogs.
In addition to infections, nail splitting can be a symptom of more serious inflammatory and autoimmune diseases, such as lupoid onychodystrophy, which causes abnormal nail formation. If your dog experiences recurrent nail splitting or other nail disorders, it is important to consult your veterinarian to rule out any underlying health conditions and ensure proper treatment.
To prevent nail splitting due to underlying health conditions, proper nail care and grooming are essential. Regular nail trimming helps maintain nail health and reduces the risk of overgrowth, cracks, and splits. Additionally, a well-balanced diet rich in essential nutrients, including biotin, zinc, and fatty acids, contributes to stronger and healthier nails in dogs.
If you notice any signs of infection, such as redness, swelling, or discolouration, it is important to seek veterinary care promptly to prevent further complications and ensure your dog's overall health and comfort.
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