Yes, chickens can have cinnamon safely. It’s FDA-approved as a feed additive for poultry and is classified as natural, non-toxic, and chemical residue-free. In fact, cinnamon is one of the most studied plant-based supplements in poultry science, with documented benefits for gut health, egg production, and resistance to heat stress.
Why Cinnamon Is Safe for Chickens
Cinnamon has been formally approved by the U.S. Food and Drug Administration for inclusion in poultry feed. The active compounds in cinnamon, particularly cinnamaldehyde (which makes up 55% to 78% of cinnamon bark oil), are rapidly processed and excreted through the kidneys. This short half-life means the compounds don’t accumulate in the bird’s body or in eggs and meat, making the end products safe for human consumption as well.
Research studies have safely fed chickens cinnamon oil at concentrations ranging from 200 parts per million up to 1,500 mg per kilogram of feed without toxic effects. For context, if you’re mixing ground cinnamon powder into feed for a small backyard flock, a half teaspoon to one teaspoon sprinkled into a few pounds of feed falls well within the ranges used in these studies.
Gut Health and Antimicrobial Effects
One of the clearest benefits of cinnamon for chickens is what it does in the digestive tract. Cinnamon encourages the growth of beneficial Lactobacillus bacteria in the small intestine and cecum while suppressing harmful bacteria like E. coli and Campylobacter. These are two of the most common pathogens responsible for digestive illness in poultry flocks.
The antimicrobial action comes from cinnamaldehyde’s ability to break down bacterial cell membranes. It disrupts the outer layer of harmful bacteria, causing them to leak their contents and die. Lab testing shows cinnamon oil is effective against E. coli, Klebsiella, Bacillus, and Listeria, as well as certain fungi. This makes it a useful natural tool alongside good flock management practices, though it’s not a replacement for veterinary care when birds are actively sick.
Respiratory Bacteria
Cinnamon oil also shows activity against several bacteria that cause respiratory disease in poultry. In lab testing published in Veterinary World, cinnamon oil stopped the growth of Staphylococcus aureus, E. coli, Pasteurella multocida, and Avibacterium paragallinarum, all of which can cause respiratory infections in chickens. The oil also reduced the ability of these bacteria to produce the toxins and proteins that make them dangerous.
Two common respiratory pathogens, Mycoplasma gallisepticum and Ornithobacterium rhinotracheale, proved more resistant to cinnamon oil in lab settings. So while cinnamon can support overall respiratory health, it won’t protect against every pathogen your flock might encounter.
Effects on Egg Production
Several studies have found that cinnamon supplementation improves laying performance. In one trial, laying hens given 40 mg/kg of cinnamon in their diet produced more eggs (89.4% vs. 80.5% for the control group) with higher egg mass and weight. A separate study on quail found that adding 200 ppm of cinnamon extract increased egg production from about 51% to 59%.
Cinnamon’s effect on egg quality is more modest. Eggshell thickness tends to stay about the same with or without supplementation. One notable finding is that cinnamon can lower yolk cholesterol by 9.5% to 16.9% compared to unsupplemented hens, with the effect becoming apparent after about eight weeks of consistent feeding. Yolk color isn’t significantly improved by cinnamon alone.
Protection During Heat Stress
Hot weather is one of the biggest threats to backyard and commercial flocks alike, and this is where cinnamon’s antioxidant properties become especially useful. When chickens overheat, their bodies produce damaging molecules called free radicals that harm cells and suppress the immune system. Broilers exposed to high temperatures on a standard diet showed reduced feed intake, higher mortality, and measurable signs of oxidative damage in their blood.
Adding cinnamon oil to the diet counteracted much of this damage. Heat-stressed birds on cinnamon-supplemented feed showed higher levels of protective antioxidant enzymes, greater total antioxidant capacity, and lower levels of a marker called MDA that indicates cell damage. The two main compounds responsible, cinnamaldehyde and eugenol, work by donating hydrogen atoms to unstable free radicals, converting them into harmless molecules. Studies found benefits at cinnamon oil doses of 500, 1,000, and 1,500 mg per kilogram of feed, with cholesterol and triglyceride levels also dropping in supplemented birds.
How to Offer Cinnamon to Your Flock
The simplest method is sprinkling ground cinnamon powder directly into your chickens’ feed. Most research uses somewhere between 0.5 and 1.5 grams of cinnamon per kilogram of feed. For a small backyard flock, that works out to roughly half a teaspoon of ground cinnamon mixed into each pound of feed. You can also stir a small amount into warm water or oatmeal as an occasional treat.
Cinnamon essential oil is more concentrated and potent than ground powder, so use it sparingly if at all. The oil should never be applied undiluted to birds or added directly to drinking water without proper dilution. If you want to use the oil form, a few drops mixed thoroughly into a large batch of feed is the safer approach.
Ceylon vs. Cassia: Which Type to Use
Most cinnamon sold in grocery stores in the United States is cassia cinnamon (Chinese or Vietnamese varieties). Cassia contains meaningful amounts of coumarin, a compound that can be hard on the liver with long-term daily exposure. Ceylon cinnamon, sometimes labeled “true cinnamon,” contains negligible amounts of coumarin.
If you’re adding cinnamon to your flock’s feed as an occasional supplement, cassia is fine. If you plan to feed it daily over weeks or months, Ceylon cinnamon is the safer long-term choice. Ceylon cinnamon is typically lighter in color, thinner in bark, and slightly more expensive. In the U.K., anything labeled simply “cinnamon” is Ceylon by default, while cassia is labeled separately. In the U.S., you’ll need to check the specific variety on the package.