04/21/2026
Info from another chicken page 🦠🐔
Coccidiosis in Chickens 🦠
There’s been a lot of talk about coccidiosis lately, especially with rainy weather here in Texas, and it’s something every chicken owner will likely face at some point.
Quick facts:
• Coccidia is a parasite that damages the lining of chicken intestines preventing absorption of nutrients
• Spreads easily: bird to bird, shoes, equipment, incubators
• Thrives in warm, wet conditions
• It does NOT mean poor husbandry
What people get wrong:
• Medicated feed = preventative - it’s not a cure and there are other factors here
(Personally, I don’t use medicated feed)
• Coccidiosis is often unavoidable, especially in certain climates
How many chicken owners approach it:
• Build natural resistance over time
• Expect occasional flare-ups with rain, stress, or new exposure
• Treat when needed—not everything, every time
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MEDS for Chickens & WHEN TO USE
1. CORID (Amprolium)
• Best for: Early/mild coccidiosis or prevention
• Blocks thiamine → starves the parasite
• Dose:
– Treatment: 2 tsp/gallon (5 days)
– Prevention: 1 tsp/gallon (5–7 days)
• Add Vitamin B (something like Poultry Cell) on days 4–6 if treating but not vitamins at the same time they say
👉 Use when: mild symptoms, no-small amount of blood, whole brooder support
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2. SULFA DRUGS (sulfadimethoxine, sulfamethazine, etc.)
• Best for: Bloody stools or secondary infection
• Targets coccidia + bacteria
• Dose: 1 tsp/gallon (5 days)
👉 Use when: blood in stool, lethargy, Corid isn’t enough
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3. TOLTRAZURIL 2.5%-5%
(Endocox, Toltramax)
• Best for: High-efficacy treatment or prevention
• Kills multiple stages of the parasite
• Dose: 2.5% strength is 1ml per liter, 5% is 1/2ml per liter
0.02 mL per gram of body weight (2 days)
👉 Use when: you want to fully clear coccidiosis or nothing else is working
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More natural:
I’ve heard Green Tea and Oregano Oil can help as well but let me know.
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At the end of the day—every flock, climate, and breeder is different.
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How do YOU handle coccidiosis in your flock?
Your experience might help someone else.
‼️P.S. Some treatments like toltrazuril (EndoCox/Baycox) are not FDA-approved for poultry in the U.S. and can leave long-lasting residues in eggs (a couple of months). This is why it’s generally ok to use for chicks because residue is said to be gone before laying BUT that’s why they’re generally not recommended for laying hens intended for consumption.
👋🏼I’m not a vet and anything said should be researched so you can make your own educated decisions!
