It is also imperative to have your pet tested yearly for heartworms while on preventative. Heartworm preventatives are highly effective, but dogs can still become infected. If you miss just one dose of your monthly medication – or give it late – it can leave your dog unprotected.
How did my dog get heartworms while on preventative?
Dogs can fall victim to heartworm even if they are on a regimen of specialized preventative drugs. Dispensing errors can be to blame, as many of the drugs are topical in nature, requiring precise application in order to work properly. Allowing your dog to swim too soon after application can reduce the efficacy.
What happens if you give a dog a heartworm pill and it has heartworms?
Heartworm preventives do not kill adult heartworms. Also, giving a heartworm preventive to a dog infected with adult heartworms may be harmful or deadly. If microfilariae are in the dog's bloodstream, the preventive may cause the microfilariae to suddenly die, triggering a shock-like reaction and possibly death.
Can a dog still have heartworms after treatment?
A: This scenario is uncommon, but it does happen. It is important to know that the heartworm test can remain positive for four-six months following treatment even if all worms were killed, so review the time line of your dog's therapy.
How effective is heartworm prevention?
Even if you give the medication as recommended, your dog may spit out or vomit a heartworm pill—or rub off a topical medication. Heartworm preventives are highly effective, but not 100 percent effective. If you don't get your dog test, you won't know your dog needs treatment.
More useful articles on a similar topic 👇
What is the success rate of heartworm treatment?How long does it take for heartworm prevention to take effect?
