Common health problems in chickens

Common Health Problems in Chickens

Keeping backyard chickens is a rewarding and relatively simple way to enjoy fresh eggs and companionship. However, like all animals, chickens are prone to certain health issues. Being able to recognise the early signs of illness is one of the most important responsibilities of a chicken owner. Many common chicken health problems can be managed at home when detected early, but some conditions require prompt veterinary attention.

Understanding the symptoms, causes, treatment options and prevention strategies for the most common poultry illnesses will help you maintain a healthy, productive flock.

Mites and Lice

External parasites are among the most common health problems in backyard chickens. Mites and poultry lice live on the skin and feathers, feeding on blood or skin debris. A small infestation may cause only mild irritation, but heavy infestations can lead to anaemia, reduced egg production, feather loss and general weakness.

You may notice your chickens scratching excessively, appearing restless at night, or showing pale combs in more severe cases. Because parasites can spread quickly through a coop, early treatment is essential.

A widely used and cost-effective treatment is Pestene Powder, which can be dusted through your chicken’s feathers and applied throughout the coop. Regular applications may be required until the infestation is under control. 

Prevention is just as important as treatment. To reduce parasite outbreaks:

• Clean and refresh bedding regularly
• Provide dust baths for natural parasite control
• Inspect birds routinely
• Quarantine new chickens before introducing them to the flock

Worms in Chickens

Internal parasites such as roundworm, tapeworm and gapeworm are common in free-ranging chickens. Birds become infected through contaminated soil, droppings or insects. Worm burdens can build up gradually and may not be immediately obvious.

Symptoms of worms include weight loss, lethargy, reduced egg production and sometimes diarrhoea. In severe cases, chickens may appear weak and undernourished despite eating normally.

Fortunately, poultry worming treatments are simple and effective. Products such as Kilverm or Piperazine can be administered according to label instructions. Kilverm is particularly convenient as it can be added directly to drinking water, making it easy to treat the entire flock at once.

Preventing worms involves maintaining good hygiene and implementing a regular worming schedule. Removing droppings frequently, rotating ranging areas and using ground sanitiser products can significantly reduce reinfection rates.

Egg-Laying Issues

Backyard hens can experience several egg-related health problems, including egg binding, egg yolk peritonitis and soft-shelled eggs. Nutritional deficiencies, stress, infections and parasites can all contribute to laying complications.

Soft-shelled eggs are one of the most common issues. While the occasional soft shell is not usually cause for concern, frequent occurrences often indicate a calcium deficiency. Since eggshells are composed of approximately 95 percent calcium, hens must have consistent access to dietary calcium.

Providing shell grit free-choice allows hens to regulate their own calcium intake. Supplementing with a product such as Vetsense Avi Calcium, which also contains Vitamin D3 to support calcium absorption, can further improve shell strength. Increasing protein intake may also assist. More serious issues, such as egg binding, require immediate veterinary care, as they can quickly become life-threatening.

Scaly Leg

Scaly leg is caused by microscopic mites that burrow under the scales of a chicken’s legs and feet. Over time, the mites cause thickened, crusty scales and a rough, lumpy appearance. Infected birds may become uncomfortable or reluctant to move.

A commonly used home remedy involves applying a thick coating of petroleum jelly (Vaseline) daily to suffocate the mites and soften the scales. However, it is always advisable to consult a veterinarian before beginning treatment to confirm the diagnosis and ensure appropriate care. Maintaining coop cleanliness and regularly inspecting birds’ legs can help prevent scaly leg infestations from spreading.

Sour Crop

Sour crop is a yeast infection affecting the crop, the pouch where food is temporarily stored before digestion. It is often caused by mouldy feed, damp conditions or disruption to gut flora following antibiotic treatment.

A chicken with sour crop may have:

• A swollen crop that feels like a water-filled balloon
• Foul-smelling breath
• Fluid discharge when pressure is applied
• Reduced appetite

Some chicken owners offer apple cider vinegar on an empty crop as supportive care. However, sour crop can worsen quickly, so veterinary advice is strongly recommended if symptoms are present.

Preventative measures include proper feed storage, discarding wet or mouldy food and offering probiotics after antibiotic use to restore gut balance.

Coccidiosis

Coccidiosis is a serious parasitic disease caused by Eimeria species, which damage the intestinal lining. It is particularly common in young chickens or birds kept in damp, overcrowded conditions. Symptoms may include watery or bloody diarrhoea, weight loss, fluffed feathers and lethargy. Because there are multiple species of Eimeria, birds may become immune to one strain but remain susceptible to others.

Treatment requires veterinary diagnosis and specific medication. Preventative products such as Vetsense Cocciprol are designed to assist in the prevention and treatment of coccidiosis in chickens and other poultry species. Keeping bedding clean and dry, avoiding overcrowding and maintaining strict hygiene standards are essential preventative steps.

Chicken Colds and Respiratory Disease

Chickens are also susceptible to respiratory infections, including Chronic Respiratory Disease. Stress, poor ventilation, overcrowding and sudden weather changes can all weaken the immune system and increase susceptibility.

Symptoms commonly include sneezing, nasal discharge, swollen eyes and laboured breathing. Mild cases may resolve with improved nutrition, warmth and reduced stress, but more severe infections may require antibiotics prescribed by a veterinarian. Immune-support supplements such as Vetsense Avi Vital may assist during periods of stress or illness by providing essential nutrients.

Protecting Your Flock

Early detection is the key to managing common chicken diseases successfully. Daily observation allows you to notice subtle changes in behaviour, appetite or egg production. Maintaining a clean coop, providing balanced nutrition, implementing regular parasite control and seeking veterinary advice when necessary will significantly reduce illness in your flock.

Healthy chickens are active, alert and productive. By understanding the most common health problems in backyard chickens and how to treat and prevent them, you can ensure your flock remains happy and thriving for years to come.