One missed dose can leave a dog unprotected for over a month. The fix isn't willpower, it's a system. Set a free monthly reminder, get an email a few days before the next dose, and follow-ups until you mark it given. Works with any brand your vet prescribed.
Done in seconds. No sign-up required.
Every state has reported it. Monthly dosing is the only thing standing between your dog and a treatable bug becoming a serious disease.
have reported heartworm cases. The disease is endemic across the US, with the highest rates along the Gulf Coast and Mississippi River basin.
American Heartworm Society incidence map
is the maximum window between monthly preventative doses. Beyond that, partial gaps in protection start to open up.
American Heartworm Society "Think 12" guideline
typical cost of treating an established heartworm infection in a dog, plus weeks of crate rest. Prevention costs about $10–$20 a month.
AKC and AHS treatment cost ranges
The interval is the problem. Once a month is just long enough that the task drops out of active memory, but short enough that one slip leaves a real gap in protection. Most owners intend to give the dose. They don't lose the pills, they just lose track of which Friday was the right Friday.
The fallback systems aren't built for follow-up. The vet hands you a six-month supply with a sticker chart that ends up in a drawer. The pharmacy auto-refills, but the box sits on the counter unopened. Calendar apps fire one notification, you swipe it away on the way to the kitchen, and the reminder is gone. None of these come back to ask whether the dose actually made it into the dog.
That's the gap between knowing you need to give the dose and actually giving it. A persistent email reminder closes it.
A monthly heartworm reminder works on a fixed anchor date — usually the day you started the medication, or the 1st of the month if you want it predictable. BoldRemind sends an email a few days before, on the day, then follow-ups if you haven't marked it done.
The 1st of the month is the easiest. You can also use the day your vet dispensed the first dose, the day you adopted the dog, or any other date that's stuck in your head.
BoldRemind emails 7, 3, and 1 day before the dose is due. Enough lead time to find the box, refill if you're running low, and not be scrambling at midnight.
If you don't click "I did it" in the email, BoldRemind sends a few short follow-ups before the next cycle starts. The reminder doesn't quietly vanish after one ignored notification.
Not the price of the pill. The price of skipping it.
Monthly preventatives kill larvae transmitted in the previous month. Skip one, and any infected mosquito bite from that window can establish an infection your dog will carry for years if undetected.
Adult heartworm treatment is a series of melarsomine injections, weeks of strict crate rest, and a real risk of complications. Prevention is a chew. The math isn't close.
If you already missed a dose →Without a system, owners genuinely lose track. The pill might have been given. It might have been spit out. The bag is half-empty either way. A logged reminder removes the guesswork.
The details — when, how often, what to do if you forgot — live here.
You pick a monthly anchor date — usually the 1st, or whatever day you started the medication on — and BoldRemind emails you a few days before it's due, then on the day, with follow-ups if you don't mark it done. No account, no app, no salesperson.
Yes. The reminder is brand-agnostic. It works the same whether your vet prescribed Heartgard Plus, Sentinel, Simparica Trio, NexGard Plus, Interceptor Plus, Trifexis, Revolution, or the 6-month ProHeart injection. You set the cadence, BoldRemind sends the email.
Nothing, except that it only reminds you about that brand. If your vet switches you from Heartgard to Simparica Trio next year, the old reminders keep coming for a product you no longer use. A brand-agnostic reminder follows your dog, not the marketing list.
Yes. Pick a starting date and BoldRemind sends an email each month on that day. You confirm the dose, mark it done, and the next month rolls forward automatically.
Yes. Cats need monthly heartworm prevention as well — Revolution Plus, Bravecto Plus, and Advantage Multi for Cats are common. The reminder is the same regardless of species or product.
Give the missed dose as soon as you remember and resume the monthly schedule. If you're more than 6–8 weeks late, the American Heartworm Society recommends a heartworm test now and a follow-up test 6 months later. See the full guide at /heartworm-prevention/forgot-to-give-heartworm-pill/.
Free. No account. Takes 30 seconds. You'll get an email a few days before each monthly dose, with follow-ups until you mark it given.
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