What are the most common backyard chicken illnesses and how do I prevent them?
The most common issues include sour crop, respiratory infections, mites, and bumblefoot. Prevention is centered on a proactive "flock-first" strategy.

Losing a hen to sour crop was a massive wake-up call for me. At the time, I didn't know what to look for, and I was definitely more reactive than proactive. After a lot of research and some hard lessons, I’ve realized that most illnesses are actually warnings that something in their environment is off.

If you are just starting out, here is the strategic list of things I now watch for to keep my "Chicken Mansion" a healthy place.

1. Digestive Health: The "Teeth" They Don't Have

Because chickens don't have teeth, they need specific tools to digest their food.

• How I Check for Sour Crop: Every morning, I do a quick check of my girls. Their crops should be flat after a night of sleep. If a hen’s crop feels squishy and she has "sour" smelling breath, it’s a red flag that she has sour crop.

• The ACV Trick: To help prevent sour crop from starting, I put apple cider vinegar in my girls' water about once a week. Note: This information is from my personal experience.

• Chicken Grit & Oyster Shells: I 100% recommend keeping chicken grit available at all times. It helps them grind up their feed and prevents blockages. I also provide oyster shells to keep their systems and eggshells strong. P.S. I love these grit and oyster feeders!

2. Respiratory Health: Cleanliness is Non-Negotiable

Chickens have sensitive lungs, and overcrowding or poor hygiene can quickly lead to respiratory issues.

• The Deep Clean: I clean out the coop and run every couple of days to prevent the accumulation of droppings. I also keep a bucket of barn lime handy and spread it everywhere during cleanings to keep moisture and odors down.

• The Sizing Rule: I stick to the "Real Math" of 4 square feet per bird in the coop and 10 square feet in the run. Adequate space promotes health and reduces the stress that weakens their immune systems.

• Ventilation: I ensure the coop has at least 1 square foot of ventilation for every 10 square feet of floor space to keep the air fresh.

3. Foot Health & Preventing Bumblefoot

To prevent injuries and infections like bumblefoot, I’ve moved away from standard perches.

• The 4-Inch Rule: I only use roosts that are 4 inches deep and laid flat. While sources suggest a diameter of 1.5 to 2 inches, I’ve found that a flat surface lets the girls rest their entire foot comfortably, reducing the risk of cuts or pressure sores.

4. Mite Vigilance: Watching for Tiny Invaders

I haven’t had a mite issue yet, but I stay vigilant because they can cause major stress and decrease egg production.

• The Night Test: Mites like the Red Mite are most active at night. I occasionally take a flashlight out after dark to check for tiny moving spots or white eggs in the cracks of the coop.

• Dust Bathing: I provide a dedicated area in the run (2-3 feet wide and 6-8 inches deep) filled with sand and soil so they can naturally scrub off parasites.

This is an article with a great list of different mites to look for and their treatments.

5. The Mystery of Lash Eggs

If you find a rubbery, layered mass in the nesting box, you are likely looking at a lash egg.

• What it means: This isn't actually an egg; it's a sign of a serious internal infection. Finding one means it is time to check your flock for lethargy or other signs of illness.

There are so many things that can go wrong to be honest, so be vigilant and never stop doing research.I also recommend following great Facebook groups like:

As an Amazon Associate I earn from qualifying purchases.

FAQ

How do I check my chicken for sour crop? The best time to check is in the morning before your birds eat. A healthy chicken's crop should be flat after a night of sleep. If the crop feels squishy or full and the hen has "sour" smelling breath, it is a strong indicator of sour crop. To help prevent this, I recommend adding apple cider vinegar to their water once a week and keeping chicken grit available at all times to aid digestion. (Note: The ACV tip is from my personal experience.)

What is the best way to prevent bumblefoot? Bumblefoot is often caused by foot injuries or pressure sores. While the sources suggest a perch diameter of 1.5 to 2 inches, I have found through my own research that using roosts that are 4 inches deep and laid flat is more effective. This allows the hen to rest her entire foot on a flat surface, reducing the risk of the cuts and staph infections known as bumblefoot. (Note: The 4-inch flat roost strategy is from my personal practice.)

How can I tell if my coop has mites? Mites are often hard to see during the day. Look for visible distress in your birds, such as excessive scratching, restlessness, or feather loss around the vent and under the wings. Because mites are most active at night, you can perform a "flashlight test" after dark to check for tiny moving spots or white eggs in the cracks and corners of your coop.

What is a lash egg? A lash egg is not actually an egg; it is a rubbery, layered mass of tissue and pus that indicates a serious internal infection in a hen's oviduct. Finding one in your nesting box is a sign that your hen needs immediate attention. (Note: The biological cause of lash eggs is based on my independent research.)

How often should I clean my chicken coop and run? To prevent respiratory issues and parasites, you should clean your coop and run every couple of days. This removes the accumulation of droppings that harbor harmful bacteria. I also suggest keeping a bucket of barn lime handy to spread after cleaning to manage moisture and odors. (Note: The use of barn lime is a personal recommendation.)

Do chickens need a dust bath? Yes. Dust bathing is a vital natural behavior that helps chickens control parasites like mites and lice while maintaining feather health. You should provide a dedicated area in the run that is 2-3 feet wide and 6-8 inches deep, filled with a mixture of sand and soil.