
03/18/2025
Talbot Tuesday: FAQ
Q: What is the "heartworm test waiver" and why do I have to sign it?
A: The 4Dx blood test - commonly referred to as a "heartworm test" - is actually a 4-part, in-house diagnostic tool that tests for heartworm and 3 tick-borne diseases, including Lyme disease.
Unlike some clinics, at Talbot Road, we do not require patients to have a 'heartworm test' in order to purchase flea/tick/heartworm prevention. If a test is declined, clients are asked to sign a waiver acknowledging their choice not to have the test.
Aside from the benefit of screening for tick diseases - which can occur even in animals on prevention, if doses are missed or are not appropriate for the dog's weight - a negative 4Dx also confirms that the dog does not have heartworm.
In very rare circumstances, a dog that is unknowingly heartworm-positive may have a serious reaction to prevention medication. This is particularly a concern in dogs coming from or having traveled to warmer climates, where mosquitos and thus heartworm are more prevalent.
While modern prevention products are very safe, and some are even used to treat positive infections, the safest option to ensure no complications is to confirm the animal is heartworm negative.
Our veterinary team is happy to answer any questions you may have about the 4Dx test!