Yes, ticks bite chickens, and certain species specifically target poultry as their preferred host. The most well-known is the fowl tick (Argas persicus), a soft-bodied tick found worldwide that feeds almost exclusively on chickens and other domestic birds. While a few ticks on a healthy adult bird may cause little harm, heavy infestations can lead to anemia, drops in egg production, and even paralysis.
Tick Species That Target Chickens
The fowl tick (Argas persicus) is the primary tick species that feeds on chickens. Unlike the hard-bodied ticks you might find on dogs or people, fowl ticks are soft-bodied and feed mostly at night. They hide in cracks and crevices of coops during the day, then crawl onto roosting birds after dark. This nocturnal feeding habit makes them easy to miss. You might notice your chickens acting restless or reluctant to roost at night before you ever spot a tick.
Other Argas species, including Argas radiatus and Argas sanchezi, also feed on poultry. Hard ticks from the Ixodes family can occasionally latch onto chickens too, especially free-range birds that spend time in tall grass or wooded areas where wildlife ticks are common. But the soft fowl tick is the one most likely to establish a lasting infestation in a coop because it lives in the structure itself, not on the bird.
How Tick Bites Affect Chickens
The most significant effect of tick feeding is anemia. Each tick draws a small amount of blood, but when dozens or hundreds of ticks feed on the same bird night after night, the cumulative blood loss adds up. Anemic chickens develop pale combs and wattles, lose weight, and become lethargic. You may also notice small red spots on the skin where ticks have been feeding.
Egg production drops during infestations, sometimes severely. Birds under constant stress from blood loss simply don’t have the energy reserves to maintain normal laying. Weight loss and general depression are common. Death from tick infestation alone is rare in adult birds, but weakened chickens become more vulnerable to other diseases and environmental stressors.
Tick Paralysis
Both Argas persicus and Argas radiatus can cause tick paralysis in chickens. During feeding, these ticks inject a toxin that interferes with nerve signaling by disrupting how cells regulate potassium and calcium. The result is progressive weakness, starting in the legs and potentially affecting the bird’s ability to stand or move. Removing the ticks typically allows recovery, but birds left untreated can deteriorate quickly.
Diseases Ticks Transmit to Chickens
Tick bites aren’t just a blood loss problem. Fowl ticks carry bacteria and other pathogens that cause serious illness in poultry.
Avian spirochetosis, caused by the bacterium Borrelia anserina, is the most notable tick-transmitted disease in chickens. The fowl tick is its primary vector. Infected birds develop listlessness, shivering, increased thirst, and ruffled feathers. Many birds stop eating, leading to weight loss. A distinctive early sign is green or yellow diarrhea with white urates. Young birds are hit hardest, and in areas with heavy tick populations, morbidity and mortality can approach 100% in severe outbreaks. Milder strains are more common, and some infections remain subclinical, meaning the birds carry the bacteria without showing obvious symptoms.
Fowl ticks also transmit aegyptianellosis, a rickettsial disease that attacks red blood cells and compounds the anemia already caused by tick feeding itself. Between direct blood loss, toxin exposure, and transmitted infections, a serious fowl tick problem can affect nearly every aspect of flock health.
Signs of a Tick Problem in Your Coop
Because fowl ticks feed at night and hide during the day, checking your birds in daylight won’t reveal much. Instead, inspect the coop itself. Look in cracks in wooden roosts, gaps between boards, under peeling paint, and in any sheltered crevice. Fowl ticks are small, flat, and grayish-brown when unfed, turning bluish-gray after a blood meal. They can survive months without feeding, which means an empty coop can still harbor a thriving tick population.
Behavioral changes in your flock are often the first clue. Birds that suddenly resist going into the coop at dusk, seem restless on the roost, or show pale combs without another obvious cause should prompt a nighttime inspection. Go out with a flashlight a few hours after dark and examine the birds and roost bars directly.
Managing Ticks in a Chicken Flock
Controlling fowl ticks means treating the coop, not just the birds. Since the ticks live in the structure and only visit the chickens to feed, cleaning and treating cracks, roosts, and nesting boxes is essential. Smooth, well-sealed surfaces with minimal hiding spots make a coop far less hospitable to ticks. Some flock keepers replace wooden roosts with metal or plastic alternatives that offer fewer crevices.
Diatomaceous earth applied in cracks and along roost bars can help with light infestations. For heavier problems, more targeted treatments may be needed. Removing birds from the coop temporarily while treating the structure is a common approach, though the ticks’ ability to survive months without a meal means a short absence alone won’t starve them out.
Can Chickens Control Ticks in Your Yard?
Interestingly, while ticks feed on chickens, chickens also feed on ticks. Free-range chickens do eat ticks they encounter while foraging. Studies in Africa found that chickens kept with cattle removed dozens of ticks per bird from the livestock. However, no studies have been conducted in North America to measure this effect, and the African research didn’t demonstrate that chicken foraging actually reduced overall tick populations. Penn State Extension summarizes the evidence simply: chickens eat ticks, but not enough to meaningfully decrease tick numbers in an area. Guinea fowl have a similar reputation with similar limitations.
So while letting your chickens free-range may result in them picking off some ticks, it also exposes them to wildlife ticks they wouldn’t encounter inside a run. It’s a tradeoff rather than a pest control strategy.