If you’ve noticed red, angry-looking circles on your dog’s stomach, your immediate reaction might be to panic and rush them to the vet. It’s a natural response for any pet owner concerned about their furry friend’s health. However, before you jump to conclusions, it’s important to know that these bites might not be as alarming as they appear.
A recent post from the Morinville Veterinary Clinic in Alberta, Canada, reassured pet owners about this common concern. According to their Facebook update, the red marks seen on a dog’s stomach are often the result of fly bites, a fairly common issue during certain times of the year.
What Causes the Red Bites on Your Dog’s Stomach?
The red marks are typically caused by black flies, which are prevalent in North America, especially in the northern regions. These flies are most active during the spring months and are often found around grassy areas where dogs tend to relax or play. The clinic explained that while the bites may look terrible, they are usually harmless and do not cause significant discomfort to the dog. In most cases, the bites heal on their own without any need for medical treatment.
The flies are generally present for a few weeks during the spring, and then their activity naturally decreases. The clinic emphasized that this phenomenon is temporary and that these bites do not require a visit to the vet, which can help pet owners avoid unnecessary expenses.
Should You Be Concerned About These Fly Bites?
While these bites are mostly harmless, experts from the American Veterinary Medical Association (AVMA) caution that pet owners should still be observant. Similar marks might be caused by other pests or even allergic reactions, which could be more serious. If you notice any changes in your pet’s behavior, skin condition, or health, it’s always a good idea to reach out to your vet for further advice.
“It’s essential to observe your pet’s overall behavior,” said Michael San Filippo, a spokesperson for the AVMA. “If you see unusual bite marks, injuries, or changes in behavior, it’s important to consult a veterinarian.”

When Should You Consult a Vet?
Although fly bites are typically harmless, there are instances where you should seek professional advice. If the bites become swollen, infected, or if your dog starts acting differently—such as scratching excessively, showing signs of pain, or exhibiting other unusual symptoms—don’t hesitate to contact your vet.
Factors such as your pet’s age, medical history, and overall health status should also be considered when determining if a vet visit is necessary.
Key Takeaway:
In summary, while red fly bites on your dog’s stomach can look alarming, they are usually harmless and will heal on their own. It’s important to stay informed and trust your instincts. If you are ever uncertain or notice any unusual changes in your pet, consulting with a veterinarian is always a good idea.
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Remember, your pet’s health is important, and staying informed can help you make the best decisions for their well-being.