How Can I Stop Fleas and Ticks From Coming Back?

The Companion Animal Parasite Council's flea guidelines state that all dogs and cats should be treated year-round and throughout their life with flea control products to limit infestations on the pet and prevent fleas from establishing in the home. Heated New England homes let fleas breed through winter regardless of outdoor temperature, and both flea and tick seasonality can be unpredictable year to year, so 'seasonal' prevention leaves real gaps. Product selection is always a conversation with your veterinarian, who can account for the pet's species, age, weight, and health history.

Mow regularly, remove leaf litter and debris, prune shrubs to let sunlight in, and reduce standing moisture — this eliminates the shaded, humid microhabitats both fleas and ticks need to survive and reproduce outdoors. Discouraging wildlife hosts like raccoons, skunks, rodents, and stray cats also matters, since they can reintroduce both pests to a yard that's otherwise well maintained. Secure trash, bring pet food inside, and seal obvious den or crawl-space access.

Regular vacuuming and hot-laundering of pet bedding removes stray eggs and larvae before they can mature into an established indoor population. This doesn't need to be the daily, all-out effort used during an active infestation — weekly vacuuming and periodic hot-washing of bedding is enough to keep ahead of any hitchhikers a pet brings in, provided the other two legs are also holding.

Fleas peak in the Northeast in late summer and early fall but persist indoors year-round because of home heating. Ticks are active any day the temperature is above roughly 40°F and the ground isn't snow-covered, which in New Hampshire can mean much of the year outside a hard winter freeze. Ramping up vigilance seasonally is reasonable, but none of the three prevention legs should actually stop — that's the gap that lets both pests come back.