What is Heartworm?
"Heartworm" is the common name for Dirofilaria immitis, is a parasitic roundworm that is spread from host to host through the bites of mosquitoes. The primary host is usually a dog but heartworms have become more common in cats and are also known to occur in other animals, such as ferrets, wolves, coyotes, foxes and, very rarely, humans.
The term "heartworm" might lead you to believe the worms infest the heart, but adult worms are often found in the pulmonary arterial system, too. Lung damage and congestive heart failure may result. The damages caused by heartworms can lead to serious health complications and death.

One mosquito bite is all it takes to infect an unprotected dog. Heartworms are transmitted by mosquitoes year-round and are found in dogs that live indoors and outdoors.

Although Cimarron Animal Hospital recommends heartworm vaccination as part of our preventative pet wellness treatments, it is very important that pet owners ALWAYS have their animals tested for heartworms before starting a preventive regimen. This is because giving a preventive to a heartworm-positive animal can cause further complications.



  • We are scheduling appointments for curbside or drop-off patients only.
  • Unfortunately, we are unable to accept new patients at this time.
  • You can refill prescriptions in our online store.
  • We can take all payments via the phone using a debit or credit card to minimize everyone’s exposure during this critical time.

Our updated hours are:
Mon., Wed., Fri. 8AM-5:30PM
Thursday 8AM-Noon
Saturday - CLOSED starting March 28

Please call our office or email us at [email protected] with questions about your pets.

If you need to bring your pet in for emergency care:

  • Please call when you get to our clinic so we can help determine the best way to help you and your pets.  We ask that you remain in your car and we will come to you.
  • We are escorting pets from your car into our hospital for exams, treatments, and drop off appointments to minimize everyone’s human exposure.
  • We ask that all dogs be on a leash and all cats and exotic pets be in a proper pet carrier or pet taxi.
  • In instances where owners must be present, we ask that only one family member be present and that you wait in your car until we call to let you know your exam room is ready for you.

Thank you for your understanding and just know we are trying our best to help everyone get through the COVID-19 pandemic. We are following the AVMA and KVMA guidelines during this difficult time.

We are here for you and your family, and thank you for your patience and understanding.

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