How to Deworm Chickens Naturally? | Backyard Flock Care

For the full breakdown, see our best Deworming Medicine For Poultry guide.

Keeping backyard chickens healthy means facing the reality of internal parasites. Most homestead flock owners want to avoid chemical dewormers when possible, and natural methods like garlic, pumpkin seeds, and diatomaceous earth are widely discussed. The honest answer is that none of these natural remedies have clinical proof they reliably kill poultry worms. What works best is a layered approach: good hygiene and pasture rotation first, then natural supplements as supportive tools, with a veterinarian-approved dewormer on hand for when birds are visibly ill. Here’s the practical route that protects your flock.

What Natural Dewormer Options Work Best?

No natural ingredient is proven to cure a heavy worm infestation. However, several homemade and supplement-based approaches are commonly used by experienced keepers for maintenance and light parasite loads. The goal is to create an environment where worms struggle to thrive while supporting the birds’ natural immunity.

• Garlic: Add crushed garlic to feed or water. One common dose is 1 clove per chicken per day for 10–14 days. Some keepers use 1 tablespoon of crushed garlic per liter of water, or 4 cloves per gallon of water. One caution: feeding garlic directly may give eggs a garlic taste.
• Pumpkin seeds: Feed raw (never cooked) seeds. A typical dose is ¼ cup per hen for three consecutive days, repeated monthly. Seeds can be ground and mixed into feed or offered as a treat.
• Diatomaceous earth (DE): Use only food-grade DE. Mix at 2% by weight of the feed (roughly 1 pound per 50 pounds of feed) or 100 grams per kilogram of feed for up to 14 days. Pool-grade DE is toxic and must never be used.
• Apple cider vinegar (ACV): Add 1 tablespoon per gallon of drinking water for one week. ACV is thought to make the digestive tract less hospitable to parasites.

Other herbs like oregano, thyme, wormwood, and black walnut hull are mentioned in homesteading circles but lack poultry-specific safety data. Wormwood and black walnut should be used with caution as they are potent herbs with limited research in chickens.

Step-by-Step: How to Use Natural Remedies

Each method requires a slightly different preparation. Follow these steps carefully, and always observe your birds for any negative reactions.

• Garlic water: Crush garlic cloves, steep them in hot (not boiling) water for 15–20 minutes, cool the infusion, then add it to the drinking water at the doses above.
• Pumpkin seed treatment: Offer raw seeds whole or ground. Feed for three days in a row, then repeat once a month for ongoing management.
• DE feeding: Mix food-grade DE thoroughly into the daily feed at the recommended percentage. Let birds eat normally; the DE works mechanically on contact with parasites.
• ACV water: Add ACV to the waterer at 1 tablespoon per gallon and provide it for one week at a time. Use only once or twice a month to avoid affecting the birds’ gut flora.

Every treatment must be paired with thorough coop cleaning and pasture management to be effective. Natural methods rarely work in a dirty environment.

Why Hygiene and Pasture Rotation Matter More

No natural dewormer works well if chickens are constantly re-exposed to worm eggs in their living area. The most evidence-supported step is breaking the parasite life cycle through management. For smaller runs, clean droppings daily, replace bedding weekly, and move birds to fresh ground when possible. Keeping pastures short and dry also reduces worm survival.

Common Mistakes to Avoid

• Using cooked pumpkin seeds: Cooking destroys the compounds that may affect worms. Only raw seeds have any potential benefit.
• Using non-food-grade DE: Pool or garden-grade DE is toxic to chickens. Always confirm the label says food-grade.
• Skipping sanitation: Expecting one natural treatment to work in a dirty coop is a recipe for reinfestation.
• Ignoring illness signs: If your chicken shows weight loss, pale comb, diarrhea, or reduced egg production, natural remedies are not sufficient. Seek fecal testing and veterinary dewormer.