Heartworms are parasites that can damage a dog’s heart, lungs and blood vessels. Prevention and testing are important because infected dogs may show few signs at first.
Dogs in Michigan are at risk of heartworm infection. Mosquitoes transmit the infection, and year-round prevention helps avoid gaps in protection.
What Is Heartworm Disease?
Heartworm disease in dogs occurs when infected mosquitoes transmit microscopic heartworm larvae through a bite. Once inside the body, these larvae grow into adult worms over several months.
Adult heartworms can reach lengths of up to 12 inches and live for years inside a dog’s heart and lungs. As the worms multiply, they interfere with normal blood flow and place significant strain on vital organs.
In the early stages, many dogs show few symptoms. As the disease progresses, signs may include:
- Persistent coughing
- Fatigue after exercise
- Weight loss
- Reduced appetite
- Difficulty breathing
- Swollen abdomen in severe cases
Because symptoms often appear late, prevention remains far safer and more affordable than treatment.
Heartworm Risk in Michigan
Michigan experiences seasonal mosquito activity that can expose dogs to heartworm infection. Even indoor dogs are not completely protected because mosquitoes can easily enter homes.
A single bite from an infected mosquito can transmit heartworm larvae. Discuss prevention with your veterinarian even if your dog spends most of their time indoors.
Many veterinarians recommend keeping dogs on preventive medication throughout the year to avoid gaps in protection.
How Heartworm Prevention Works
Effective dog heartworm prevention relies on medications designed to eliminate heartworm larvae before they mature into adult worms.
Most preventive products are available as:
- Monthly chewable tablets
- Monthly topical treatments
- Long-acting injections administered by a veterinarian
These products are highly effective when given consistently and according to veterinary recommendations.
Missing doses can increase the risk of infection, making it important to follow the schedule prescribed by your veterinarian.
Understanding Heartworm Medication for Dogs
There are several types of heartworm medication for dogs, and the right choice depends on your pet’s age, lifestyle, and medical history.
Some preventive medications also provide protection against:
- Intestinal worms
- Hookworms
- Roundworms
- Fleas and ticks
Your veterinarian can help determine which product best fits your dog’s needs.
Before starting medication, most dogs require a heartworm test to ensure they are not already infected. Giving preventive medication to an infected dog without proper evaluation can lead to complications.
The Importance of Heartworm Testing
Routine heartworm testing is an essential part of preventive veterinary care.
Even dogs receiving preventive medication should be tested regularly. Testing helps identify infections early and confirms that prevention programs are working as intended.
Most heartworm tests involve a simple blood sample and can often be completed during a wellness visit.
Annual testing allows veterinarians to monitor your dog’s health and catch potential problems before they become serious.
Additional Steps for Canine Heartworm Protection
While medication remains the foundation of canine heartworm protection, there are additional measures pet owners can take to reduce risk.
These include:
- Limiting exposure to mosquitoes during peak activity periods
- Removing standing water from yards
- Using pet-safe mosquito control methods
- Keeping up with routine wellness exams
- Following your veterinarian’s recommendations for preventive care
Combining preventive medication with good environmental management can further reduce the likelihood of infection.
Partnering With Your Local Veterinarian
Our Madison Heights team can review your dog’s prevention and testing needs during a wellness visit.
Regular wellness visits provide opportunities to discuss heartworm risks, review preventive medications, and perform annual testing. These appointments also help identify other health concerns before they become more serious.
Ask when the next dose and heartworm test are due. If a dose is missed, contact your veterinary team for instructions.
Protecting Your Dog Year Round
Heartworm disease is a serious but preventable condition. Consistent prevention, annual testing, and regular veterinary care can help keep your dog healthy and protected.
Keep prevention and testing on the schedule recommended for your dog, and tell your veterinary team if a dose is late or missed.
Frequently Asked Questions
How often should dogs receive heartworm prevention?
Give prevention on the schedule prescribed for the specific product. Many products are monthly, while others have different dosing intervals.
Can indoor dogs get heartworms?
Yes. Mosquitoes can enter homes and bite indoor pets, making heartworm prevention important for all dogs.
When should puppies start heartworm prevention?
Many puppies can begin heartworm prevention as early as eight weeks of age. Your veterinarian can recommend the appropriate timing.
How is heartworm disease diagnosed?
Heartworm disease is typically diagnosed through a blood test performed during routine veterinary visits.
Is heartworm treatment expensive?
Yes. Treating heartworm disease is often significantly more expensive than preventing it. Prevention is generally safer, simpler, and more affordable.
Do dogs need heartworm testing every year?
Annual testing helps detect infection, including in dogs receiving prevention. Your veterinarian can explain how testing fits your dog’s care.