
Chicken keepers need to be vigilant about spotting signs of illness in their birds, as chickens are prey animals and can be bullied by other chickens when they are unwell. Common signs of illness in chickens include lethargy, loss of appetite, vomiting, diarrhea, a dull-looking coat, and cloudy or runny eyes. If you suspect your chicken has a fever, you can take its temperature through its vent with a thermometer; the average chicken body temperature is 102 to 103 degrees Fahrenheit. A chicken with a fever will also feel hot to the touch, especially in the inner leg and belly area.
| Characteristics | Values |
|---|---|
| Body temperature | 102-103°F |
| Skin colour | Bright red |
| Respiration | Mouth breathing, gasping |
| Appetite | Reduced |
| Water intake | Increased |
| Behaviour | Out of the ordinary, prefers to lay down, difficulty standing |
| Eyes | Cloudy, runny, oval or out-of-round pupils |
| Defecation | Diarrhoea, green faeces |
| Egg-laying | Reduced |
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What You'll Learn

Monitor for common signs of illness
Other signs of illness include inactivity, loss of appetite, vomiting, diarrhoea, a dull-looking coat, and cloudy or runny eyes. You should also check the chicken's wattle, comb, and face for swelling or discolouration. For example, a vibrant red comb may indicate a fever.
If you suspect your chicken is sick, try feeding it a special treat, like cooked oatmeal, corn, or mealworms, to see if it shows interest. If it doesn't, that will confirm your suspicions.
You should also check for common illnesses. For example, Mareks disease causes stumbling and oval or out-of-round pupils. Aspergillosis causes gasping and paralysis and can be caused by eating mouldy food or bedding.
If you notice any of these signs, begin your sick chicken treatment process. Isolate the bird to prevent the spread of disease and ensure it has plenty of fresh drinking water to stay hydrated.
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Check for stumbling or gasping
Stumbling and gasping are two signs that a chicken is feverish and sick. If a chicken is stumbling, it could be indicative of Mareks, a disease that also causes paralysis and oval-shaped pupils. A chicken with a fever may also have trouble breathing, and gasping could be a symptom of aspergillosis, a fatal disease caused by eating mouldy feed or bedding. Gasping can also be a symptom of infectious bronchitis, a very contagious disease that also causes a watery discharge from the eyes and nostrils, and a dramatic drop in egg production.
If you suspect your chicken is sick, you should monitor it for common signs of illness, such as inactivity, loss of appetite, vomiting, diarrhoea, a dull-looking coat, and cloudy or runny eyes. You should also keep an eye out for any behaviour that is out of the ordinary, such as holding its wings in a funny position, or standing away from the rest of the flock. If you notice any of these symptoms, contact your veterinarian.
To check for a fever, you can take the chicken's temperature with a thermometer. The average temperature of a chicken is 102 to 103 degrees Fahrenheit. If the chicken has a fever, it will likely feel hot to the touch, especially in the inner leg and belly area.
If you suspect your chicken has a fever, you should isolate it from the rest of the flock and monitor it closely. You should also check for other symptoms, such as stumbling or gasping, and seek veterinary advice if necessary.
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Observe eye appearance
When observing a chicken's eye appearance, there are several indicators that can suggest the bird has a fever. Firstly, check if the eyes are cloudy or runny, which could be a sign of sickness. Clear drainage from the eyes may also be a symptom of infectious sinusitis. In addition, observe the shape of the pupils; if they appear oval or out of round, this could be indicative of Mareks disease, which also causes stumbling.
Furthermore, the eyes may provide clues about other health issues. For example, a dull expression in the eyes can be one of the first signs of staphylococcal infections, which can progress to paralysis. Foamy conjunctivitis is a symptom of certain viruses, such as psittacosis or parrot fever. A chicken with a fever may also exhibit lethargy, difficulty breathing, and reduced appetite, so observe their behaviour in conjunction with eye appearance.
It is important to note that a chicken's overall eye health can indicate their general health. Bright, round, wide-open, and clear eyes with no reddening of the conjunctiva are typical of a healthy bird. If you suspect your chicken is unwell, it is recommended to contact a veterinarian for further advice and to determine the underlying cause.
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Take the chicken's temperature
If you suspect that your chicken might have a fever, it is important to take its temperature. A chicken's average temperature falls between 102 and 103 degrees Fahrenheit.
To take your chicken's temperature, you will need a thermometer. You can insert the thermometer into the chicken's vent, which is located near the chicken's tail. Ensure that you are wearing a latex glove and apply some lubricant such as KY jelly to the thermometer before inserting it. This will help to reduce friction and make the process more comfortable for the chicken.
If you do not have a thermometer, you can also feel the chicken's skin, particularly along the breastbone, to see if it feels hot to the touch. Additionally, you can check the colour of the chicken's skin in this area; if it appears bright red, it could be a sign of a fever.
It is important to note that a fever is often an indication that the chicken is fighting an infection. Other signs of infection include lethargy, respiratory distress, reduced appetite, and changes in droppings such as diarrhoea. If you suspect that your chicken has an infection, it is important to provide it with plenty of fresh water and keep it hydrated. You can also add vitamins or electrolytes to the water to aid in rehydration.
If you notice any of these symptoms or suspect that your chicken is unwell, it is always best to consult a veterinarian for proper diagnosis and treatment.
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Provide treatment
If your chicken has a fever, there are several steps you can take to provide treatment and care. Firstly, it is important to isolate the bird to prevent the potential spread of disease to other chickens. Set up a separate space for the sick chicken, such as a dog crate or rabbit hutch in a quiet, warm, and protected area away from other animals. Ensure you use separate supplies for feeding and watering the sick bird, and practice good hygiene, such as wearing boot coverings or dunking your boots in a bleach solution after leaving the isolation area.
Next, focus on providing supportive care for your chicken. Make sure they have access to fresh water and encourage hydration, especially if they are showing signs of lethargy or inactivity. You can also encourage your chicken to eat by crushing layer feed and mixing it with warm water or milk to create a mash. Use a spoon, syringe, or tube to feed the chicken if necessary. However, if your chicken is eating and drinking normally, avoid adding extra supplements to their diet, as this could shock their system and worsen their condition.
If your chicken has a high fever, you can try giving them pedialyte to replace electrolytes and providing a massage to their crop after giving them fluids. Additionally, some sources suggest using herbs and essential oils, such as oregano or oil of oregano, to help treat chicken diseases. However, it is important to note that randomly treating a sick bird with antibiotics, garlic, vinegar, molasses, or oregano without knowing the underlying issue can complicate the diagnosis and potentially make their condition worse.
In some cases, a fever in chickens can be caused by underlying illnesses, such as coccidiosis or fowl cholera, which may require specific treatments. Coccidiosis is caused by coccidia, protozoa that can be present in the soil, and it can be treated by mixing liquid Corid with water and ensuring that this is the only water the chickens can access for five days. Fowl cholera, caused by bacterial infection, can be treated with tetracycline, molasses, and oyster shell therapy.
If you suspect your chicken may have a more serious illness or infection, it is important to consult a trained poultry veterinarian or a vet who treats chickens. They can help diagnose the specific issue and prescribe appropriate treatments, such as antibiotics for secondary bacterial infections. Remember, some illnesses may require laboratory testing for accurate diagnosis and treatment.
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Frequently asked questions
Some common signs that indicate a chicken may have a fever include lethargy, loss of appetite, trouble breathing, runny eyes, and a hot belly.
If you suspect your chicken has a fever, isolate it from the rest of the flock to prevent the disease from spreading. Ensure the sick chicken stays hydrated by providing it with plenty of fresh drinking water. You can also add a vitamin or electrolyte supplement to the water.
A chicken may develop a fever due to various infections, such as bronchitis, influenza, or a respiratory infection. It can also be caused by ingesting toxic substances or mouldy food.
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