Red and black chicken eat whole snake for food in the garden on countryside

Are Chickens Truly Immune to Snake Venom?

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6 chickens free ranging

Are chickens immune to snake venom?  

If you have backyard chickens and have seen snakes in your yard, then I’m sure you’ve asked yourself this very question.  

There is an urban legend that chickens are immune to snake venom, however, it is just that – an urban legend.  

The claim that chickens have snake venom immunity is one of those curious stories that have been passed down from generation to generation.  These stories, often shared by farmers, typically stem from chickens attacking snakes by pecking and clawing at them without suffering any apparent ill effects.

Adult chickens will confront snakes due to their natural instincts and territorial behaviors. They may perceive snakes as threats to their territory, chicken eggs, or baby chicks, prompting them to attack and peck at the snake. This defensive behavior can lead to the snake’s death, but it doesn’t make the chicken immune to venom.

These accounts have led to the belief that chickens are immune to snake venom.  While it’s an appealing concept, one that I’m sure all my fellow chicken keepers would wish to be true, the answer is a bit more complex.

The only mammals that are known to have immunity to snake venom are a honey badger, mongoose, hedgehog, and opossum.

Mongoose in tall grass

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Are Chickens Immune to Snake Venom?

Chickens, like many other birds, have developed some level of resistance to certain snake venoms, but they are not completely immune. Their resistance is not due to immunity in the way humans can develop immunity to diseases or toxins. Rather, it’s the result of the evolutionary adaptations that have made them less susceptible to snake venom.

Chickens have some natural defenses against snake venom.

white chicken in tall grass

Faster Metabolism

Chickens, and birds in general, have a faster metabolic rate compared to mammals. This can help them process and eliminate toxins more quickly, reducing the impact of the venom.

Beak and Talon Defense

Chickens are known to defend themselves against snakes with their beaks and talons. They may peck or scratch at a snake, preventing it from delivering a full venomous bite.

Size Difference

Most snake venoms are adapted to subdue and digest prey that is smaller than the snake itself. Chickens are often larger than the snakes they encounter, which may reduce the effectiveness of the venom.

Feathers

Chickens have layers of feathers which may help protect them from the snake bite penetrating their skin.

Are chickens immune to snake venom?

Let’s look at a couple of venomous snakes where chickens stand the best chance of surviving a snake bite.

Massasauga Rattlesnake

Massasauga Rattlesnake

The Massagaua rattlesnake is one of the few snakes that live in northern regions and is the only venomous snake found in Ontario.  Although their venom is highly toxic, fatalities are very uncommon because of the species’ short fangs which can only inject a small amount of venom.

Garter Snake

Garter Snakes

These smaller snakes are not considered highly venomous, but some species of garter snakes do produce mild venom.  Chickens can often tolerate bites from Garter Snakes without severe consequences.

It’s important to remember that resistance to snake venom can vary among individual chickens, and the outcome of a snakebite can depend on factors like the size of the snake, the location of the bite, the health of the chicken, and other variables.

While chickens may have some natural resistance to specific snake venoms, it is still crucial to take measures to prevent encounters between chickens and venomous snakes, as a bite can be potentially harmful or even fatal.

Most common venomous snakes that chickens are not immune to

cottonmouth snake

Cottonmouth, otherwise known as, Water Moccasin

While primarily aquatic, cottonmouths can be found near water sources where chickens may roam. They average 2 to 4 feet in length, and range from southeastern Virginia to Florida, west to central Texas, and north to southern Illinois and Indiana.

Cottonmouth venom is composed primarily of hemotoxins that break down blood cells, preventing the blood from clotting or coagulating.

Copperhead

Copperhead

Copperheads are one of the most common pit vipers found in North America they average between 2 and 3 feet in length, and can be found all over the US.

Copperhead fangs deliver sharp, extremely painful bites, and while their venom is not as potent as other species, it can still harm chickens.  Animals and people with compromised immune systems face higher risks from the venom and complications during treatment. 

coral snake

Coral Snakes

Coral snakes are elapids and have highly potent neurotoxic venom. Though they are relatively rare and not usually encountered by chickens, their venom can be fatal if bitten. The coral snake venom’s neurotoxic symptoms are muscle weakness, speech impairment, swallowing challenges, and difficulty breathing.  They inhabit the Americas, India, Asia, and the islands of Southeast Asia.

Mojave Rattlesnake

Mojave Rattlesnake

The Mojave rattlesnake is one of the most deadly snakes in North America.  Their venom is potent in neurotoxins which attack the nervous system, and hemotoxins which attack the blood.

Mojave rattlesnakes are found in the southwestern parts of the United States. This area includes California, Nevada, southwestern Utah, most of Arizona, southern New Mexico, and some of Texas. 

Large wild Eastern Diamondback rattlesnake - crotalus adamanteus laying in pine needles

Eastern Diamondback Rattlesnake

The eastern diamondback rattlesnake is North America’s longest and largest venomous snake.  Their venom is a potent hemotoxin that kills red blood cells and causes tissue damage. 

Their average length is 3 to 6 feet, but some adults can grow as long as 8 feet. Um, no thank you!!  These snakes are mostly found in Florida, North Carolina, and southern Mississippi through eastern Louisiana.  

Western Diamondback Rattlesnake (Crotalus atrox) coiled to strike

Western Diamondback Rattlesnake

This large snake is known for its potent venom which immobilizes their prey which includes birds, reptiles, chickens, and other small mammals. Their venom is mainly hemotoxic and attacks the victim’s blood system.

They are typically found in the southwestern part of the United States. and the northern half of Mexico. In the U.S. you’ll find them in Arizona, California, New Mexico, Oklahoma, and Texas.

Timber Rattlesnake

Timber Rattlesnake

Like other members of the pit viper family, the timber rattlesnake has a large, heavy-bodied appearance. Adults typically reach lengths of 2.5 to 5 feet but there are reports of timber rattlesnakes growing up to 7 feet long. Again – Nope!

This rattlesnake species can be found all over North America.  Kansas, Texas, Iowa, Wisconsin, Georgia, the Carolinas, West Virginia, Pennsylvania, and New England. These rattlesnakes have been observed as far north as New York and as far south as northern Florida.

A prairie rattlesnake coils into striking position, flicking its forked tongue

A rattlesnake bite, from any rattlesnake species, is a medical emergency as rattlesnake venom is composed mainly of hemotoxic elements.  Hematotoxins are toxins that destroy red blood cells and disrupt blood clotting.

Snake in long grass with mouth open showing venom

Effects of venom

According to the World Health Organization, a poisonous snake bite can cause difficulty breathing, kidney failure, and tissue damage depending upon the type of venom.  

A single bite from a venomous snake contains a cocktail of proteins and enzymes that target various physiological processes in the victim. Some effects of snake venom can be immediate and fatal, while others may take time to manifest.

Snake venom can be categorized into three main types of venom: neurotoxic, hemotoxic, and cytotoxic. Each of these venom types has distinct effects on the victim’s body.

Neurotoxic venom primarily affects the brain and the nervous system, often taking its toll without causing significant initial pain. Many individuals who fall victim to neurotoxic snakebites remain unaware of their condition until symptoms gradually manifest.

Hemotoxic venom, on the other hand, disrupts the body’s blood-clotting mechanisms by affecting the cardiovascular system. It also leads to organ degeneration, widespread tissue damage, and substantial internal bleeding.

Lastly, cytotoxic venom inflicts intense pain by impairing tissues at the molecular level, ultimately resulting in cell death.

rooster crowing

Signs of a snake bite

Snake bites in chickens can be dangerous and even fatal if left untreated. It’s essential to recognize the signs of a snake bite so that you can take prompt action to protect your chickens.

Sudden distress

Chickens that have been bitten by a snake often exhibit sudden and severe distress. They may become agitated, vocalize loudly, or appear extremely anxious.

Swelling and redness

The area around the site of the bite may become swollen and red. This can be especially noticeable if the snake bite occurs on a visible part of the chicken’s body, like the comb or wattles.

Puncture wounds

Snake bites typically leave puncture wounds on the chicken’s skin. These wounds may be small and appear as two distinct fang marks, but they can be challenging to see if the feathers cover the area.

Bleeding

Snake bites can cause bleeding at the site of the wound. If you notice fresh blood on your chicken’s feathers or around the wound, it may be a sign of a snake bite.

Weakness and paralysis

As the snake’s venom takes effect, chickens may become weak and paralyzed. They may have difficulty standing or walking.

Drooping wings and tail

Chickens bitten by snakes may have drooping wings and tails, and they may appear lethargic or listless.

Respiratory distress

Some snake venoms can affect a chicken’s respiratory system, leading to difficulty breathing or open-mouth breathing.

Neurological signs

In severe cases, snake bites can lead to neurological symptoms such as tremors, seizures, or loss of coordination.

If you suspect that a chicken has been bitten by a snake, it’s crucial to give the chicken immediate medical attention. Isolate the affected chicken from the rest of the flock to prevent further attacks and stress. Clean and disinfect the wound and keep the chicken as calm and comfortable as possible.  Try to determine the species of snake and contact a veterinarian for advice and potential antivenom if available. Prompt treatment can greatly improve the chicken’s chances of survival.  

close up of chickens on farm behind fencing

How to protect your chickens from snakes

If you live in a region where venomous and nonvenomous snakes are common, it’s crucial that you take precautions to protect chickens from snake encounters.  Even a nonvenomous snake can be a potential threat to your chicken’s eggs.

Predator-proof the chicken coop and run

The most effective method to secure coops and runs is to enclose the entire structure with ¼” hardware cloth. To deter snakes from digging beneath the run, it is a good idea to bury a 6-12” strip of hardware cloth along the run’s perimeter.  I don’t recommend using chicken wire as small snakes can get through the chicken wire holes.

Conduct one last inspection to confirm that your coop and run are indeed predator-proof. Look for any potential vulnerabilities or any openings through which a quarter can fit. If a quarter can pass through an opening, so can small snakes, which means you should install additional hardware cloth for protection.

Remove Food Sources

Seal garbage cans tightly and avoid leaving pet food or birdseed outside, as they can attract rodents that, in turn, attract snakes.

Control rodent populations through traps or professional pest control services.  If you have a bird feeder, ensure it’s located away from your home to prevent spilled seeds from attracting rodents.

Maintain Your Yard

Snakes prefer tall grass so keep your grass short and trim bushes and shrubs regularly.  Remove or elevate woodpiles, rocks, and other potential hiding spots, as these can provide shelter for snakes.

Repair any holes or gaps in fences and walls to prevent snakes from entering your property.

Snake Repellent

Some commercial snake repellents are available, but their effectiveness can vary.  Natural repellents like sulfur or mothballs are sometimes recommended, but their effectiveness is debated.

Be Cautious with Water Features

If you have a pond or other water features, be aware that snakes may be attracted to them. You can use fencing or netting to deter snakes from approaching.

Call Professionals

If you have a persistent snake problem or are dealing with venomous snakes, it’s best to contact a professional pest control service or a local wildlife management agency to safely remove or address the issue.

Remember that not all snakes are dangerous, and many are beneficial for controlling rodent populations. If you are unsure about a snake you encounter, it’s best to err on the side of caution and seek professional assistance or advice.

Educate Yourself

Learn about the types of snakes in your area and their habits. This knowledge will help you take appropriate precautions.


Snakebites can pose a significant risk to chickens. Depending on the snake species and the amount of venom injected, a snakebite can lead to serious consequences for the bird.

If you keep chickens in an area where venomous snakes are present, it’s crucial to take preventative measures to protect your flock from potential danger. This includes keeping the coop secure, removing potential snake hiding spots, and being vigilant to ensure the safety of your feathered friends.

​What questions do you have?  Let me know in the comments!

Related Posts:
Ways to Protect Your Chickens from Predators
Backyard Chickens 101: Essential Chicken Supplies

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