How this deworming interval tool works
Deworming splits into internal cover for intestinal worms and heartworm, and external cover for fleas and ticks. Enter the date of the last dose and the interval your product uses, and the tool gives the next due date, how many days that is from today, and which target groups your checked lifestyle factors point to.
CAPC advises keeping animals over six months on a monthly, year-round broad-spectrum preventive that includes heartworm, so the interval list starts at one month. Because products differ, a custom interval field sits next to it. Content is current as of October 2026.
Intervals differ by product and by local rules, so this tool builds no dose-by-dose schedule and works out only the next single due date. It does not pick products or dosages. This tool is for reference only and does not replace veterinary care. Contact your veterinarian right away if you notice symptoms or suspect a problem.
Frequently asked questions
Use the interval printed on the product you already use. CAPC advises a monthly, year-round broad-spectrum preventive for animals over six months, so the list starts at one month.
Young animals are often dosed more often. This tool does not fix an interval; when the age is under six months it adds a note to follow your veterinarian instructions.
Intervals differ by product and by local rules, and a wrong schedule is risky. The tool works out only the next single due date.