If you're a dog owner, then you know that this time of year can be scary when it comes to unexpected pests. Black flies are no exception, as they become more active and increase their presence across the spring and summer months. Unfortunately, these little critters also love our four-legged friends just as much as we do – but don't worry! In this blog post, we'll provide some tips on identifying black fly bites on dogs as well as practical advice for soothing those troublesome areas fast. Read on to discover how to make your pup's next outdoor adventure safe and enjoyable all season long!

What are Black Flies?

Black flies, also known as buffalo gnats or gnats. They are small, blood-feeding insects that are notorious for their painful bites and swarming behavior. Black flies are commonly found near flowing water sources, such as streams and rivers, as they require clean water for their reproductive cycle.

The size of black flies usually ranges around 1/16 inch in length. They possess a robust body with a dark hue, a round back, broad wings, and small legs. These flies are characterized by their unique appearance, with minimal hair on their bodies.

blackfly

While black flies can be found in different geographical locations, their presence is particularly prevalent in humid and wooded regions. They are most active during the warmer months, typically from spring to early fall. The primary food source for adult black flies, which include dogs, is the blood of mammals.

Black fly bites on dogs can certainly be concerning, but rest assured that most of the time, they pose minimal harm. While these pesky insects can indeed cause symptoms such as itching in dogs, they are typically not severe.

How to Identify Black Fly Bites on Dogs

It is important to be able to recognize black fly bites on your dog to ensure proper treatment. These bites may show up as flat, red marks on your dog's skin, sometimes with a bullseye-like outline. Alternatively, they may also present as dark red bumps. Black flies usually attack exposed areas like the ears and belly. It can be difficult to distinguish black fly bites on dogs from other insect bites and even some types of bacterial skin infections. Black flies typically target exposed areas, such as the belly and ears.

black fly bites on dogs

🚨 Although rare, allergic reactions can occur and require immediate attention. If you notice hives or swelling in multiple areas other than the bite site and facial swelling, it could be a sign of a severe reaction. In such cases, contact your veterinarian right away!

Treating Black Fly Bites on Dogs

When it comes to treating black fly bites in dogs, there are several options available to alleviate discomfort and promote healing. If your dog experiences itchiness and irritation from the bites, using antihistamines can be beneficial. Antihistamines help reduce allergic reactions and relieve itching caused by the bites.

Additionally, applying hydrocortisone cream to the affected areas can help soothe the skin and reduce inflammation. Hydrocortisone cream has anti-inflammatory properties that can provide relief from itching and promote healing. Apply warm compresses such as ice packs or cold cloths to the bites to reduce swelling and discomfort.

In some instances and if there are multiple black fly bites, your veterinarian may recommend using system corticosteroids such as prednisone to help reduce inflammation and irritation from the fly bites.

As always, it is essential to seek veterinary guidance and follow their recommended treatment plan for your dog's individual situation.

How to Prevent Black Fly Bites on Dogs

The best way to protect your dog from black fly bites is by avoiding areas where these insects are most likely to be present. Avoiding wooded regions and bodies of water, such as streams and rivers, can help reduce the chances of encountering black flies.

Additionally, as black flies are most active a couple of hours after sunrise and a couple of hours before sunset, limiting outdoor activities to daylight hours can also help reduce your dog's risk of being bitten.

We recommend using protective clothing for your dog in areas of high black fly activity. To protect your dog from black fly bites, you can use a light-coloured bandana around its ears as this is a very common area for fly bites to occur.

Currently, there are no approved products to deter black flies from dogs. While very small amounts of DEET have been used successfully in dogs, due to the risk of toxicity, we do not recommend applying any insect repellents such as DEET.

When Should You Be Concerned?

Although most black fly bites on dogs can be treated at home, there may be situations where seeking professional veterinary care is necessary. If you see that the bites are getting worse, your dog is scratching too much or you notice any worrying symptoms, it is essential to contact your veterinarian immediately for advice and potential treatment options.

If you notice signs of an allergic reaction such as facial swelling, hives, or intense itchiness, contact your veterinarian immediately.

Black Fly Bites vs Ringworm: What's the Difference?

It can be tricky to distinguish between black fly bites and ringworm lesions. Ringworm is a contagious fungal infection that affects both people and animals, including dogs. It is characterized by circular patches of hair loss, redness, or scaly skin on your dog's face, feet, or belly.

In contrast, black fly bites usually show up as flat, red marks on your dog's skin with a bullseye-like outline. Additionally, black fly bites tend to occur in clusters, while ringworm patches are usually isolated and can be anywhere on the body.


Overall, black fly bites on dogs can be concerning but are usually not severe. It is important to recognize the symptoms of black flies and take necessary precautions when outdoors in areas where they may be present. To reduce your dog's risk of being bitten by these pesky insects, consider avoiding wooded regions near bodies of water during warmer months and using protective clothing such as a light-colored bandana around their ears. If you suspect that your pup has been bitten or if any worrying symptoms arise, contact your veterinarian for advice right away. With proper prevention measures and quick action should an infestation occur, you'll keep your furry friend safe from irritating black flies all season long!