The Hidden Hitchhikers: Parasite Prevention for Your Pets
Parasites are one of the most common — and most preventable — health threats pets face. Fleas, ticks, heartworms, and intestinal worms are active year-round in Southern California, and most pets will encounter them at some point.
The good news: prevention is straightforward, affordable, and far easier on your pet than treatment. Here's what you're up against and how to stay ahead of it.
Know your parasites
The five most common — and what they actually do.
Fleas
Cause intense itching, hair loss, and skin irritation. In large infestations, can cause anemia — particularly dangerous in kittens and small dogs. Fleas also carry tapeworm larvae, which infect pets through ingestion during grooming.
Dogs, cats & humans
Ticks
Transmit Lyme disease, Ehrlichiosis, and Anaplasmosis — all of which can cause joint pain, fever, lethargy, and in serious cases, organ damage. Tick activity in LA County has increased as development expands into natural areas.
Dogs, cats & humans
Heartworms
Transmitted by mosquitoes. Adult heartworms live in the heart and pulmonary arteries — causing progressive, often irreversible damage. Treatment in dogs is expensive and hard on the body. There is no approved treatment for cats.
Dogs & cats
Intestinal parasites
Roundworms, hookworms, whipworms, and tapeworms live in the GI tract, causing vomiting, diarrhea, weight loss, and malnutrition. Roundworms and hookworms are zoonotic — they can infect humans, particularly children who play in contaminated soil.
Dogs, cats & humans
Ear mites
Particularly common in cats and young animals. Cause intense itching, head shaking, and dark waxy discharge. Left untreated, can lead to secondary bacterial or yeast infections.
Cats especially
Why prevention matters
Heartworm treatment in dogs costs several hundred to over a thousand dollars, requires multiple vet visits, restricted activity for months, and is genuinely hard on the animal. Monthly heartworm prevention costs a fraction of that. The math is straightforward.
The same logic applies across the board. Flea infestations are harder to eliminate than prevent. Tick-borne diseases can cause long-term complications. Intestinal parasites in young animals can permanently affect development. Prevention is not optional care — it's foundational.
How to protect your pet
A practical prevention plan.
Year-round preventatives
In Southern California, parasites are active year-round — there's no real "off season." Monthly flea, tick, and heartworm preventatives should be administered consistently, not seasonally. Ask your vet which products are appropriate for your pet's species, weight, and health status.
Routine testing
Annual fecal testing catches intestinal parasites before they cause significant damage. Annual heartworm screening confirms prevention is working and catches any breakthrough infections early. These are standard components of a wellness visit.
Tick checks after outdoor time
After hikes, trail walks, or time in brush or tall grass, inspect your pet thoroughly — ears, underbelly, between the toes, around the collar. Remove any ticks promptly with fine-tipped tweezers, pulling straight out without twisting.
Environmental hygiene
Clean bedding regularly, scoop litter boxes daily, and pick up yard waste promptly — feces is a primary transmission route for intestinal parasites. Wash hands after handling soil or cleaning up after pets, especially around young children.
Saving Grace tip: Never use dog flea and tick products on cats — some ingredients, including permethrin, are highly toxic to cats. Always confirm species-appropriateness before applying any topical or oral preventative.
Worth knowing
Some pet parasites can infect humans.
Roundworms and hookworms can cause Visceral and Cutaneous Larva Migrans in people — conditions where larvae migrate through tissue, causing pain, inflammation, and in serious cases, organ damage. Children who play in soil or sandboxes are particularly at risk. Ticks picked up by pets can also detach indoors and bite humans. Protecting your pet is a meaningful step in protecting your household.
Is your pet's parasite prevention up to date?
Saving Grace reviews and updates parasite prevention as part of every in-home wellness visit across greater Los Angeles. We'll assess your pet's current protocol, test as needed, and make sure they're covered year-round.
