The recommended dosage of Corid (amprolium) for chickens is typically 0.0125% in their drinking water for 5-7 days to treat coccidiosis.
Coccidiosis is a common and potentially deadly disease in chickens caused by microscopic parasites. Proper Corid (amprolium) dosage is critical for effective treatment. This guide covers everything from symptoms to prevention.
Understanding Coccidiosis in Chickens
Coccidiosis is caused by Eimeria parasites that attack a chicken’s intestinal lining. Young birds aged 3-6 weeks are most vulnerable, but adults can also be affected. The disease spreads through contaminated feces and thrives in damp conditions.
Key Symptoms to Watch For
- Bloody or watery droppings
- Pale combs and wattles
- Lethargy and weakness
- Decreased appetite
- Ruffled feathers
- Weight loss
Corid Dosage Guidelines
Corid 9.6% solution contains amprolium, which works by blocking thiamine absorption in coccidia parasites. Follow these precise dosing instructions:
| Severity | Dosage | Duration |
|---|---|---|
| Severe outbreak | 2 tsp per gallon (0.024%) | 5 days |
| Moderate outbreak | 1 tsp per gallon (0.012%) | 5 days |
| Prevention | 0.5 tsp per gallon (0.006%) | 21 days |
Follow-Up Treatment
After initial treatment, continue with 0.5 tsp per gallon for 7-14 days to eliminate remaining parasites. This two-phase approach prevents recurrence.
Important Treatment Notes
Water Management
Corid must be the only water source during treatment. Change the medicated water daily to maintain potency. Remove all other water sources, including natural ones if your chickens free range.
Vitamin Supplementation
After treatment, provide vitamin supplements for 3-4 days. Corid depletes thiamine (B1), so consider products like Sav-A-Chick or Rooster Booster Poultry Cell.
Egg Safety
There’s no egg withdrawal period for laying hens treated with Corid. Eggs remain safe to eat during and after treatment.
Alternative Treatments and Prevention
Natural Prevention Methods
- Apple cider vinegar (1 tbsp per gallon of water)
- Crushed garlic in feed
- Probiotics to maintain gut health
Coop Management
Prevent outbreaks by keeping coops dry and clean. Rotate chickens to fresh areas and avoid overcrowding. Proper ventilation reduces moisture where coccidia thrive.
When to Consult a Vet
Seek professional help if:
- Symptoms persist after treatment
- Multiple birds die suddenly
- You’re unsure of the diagnosis
For more information on chicken health, see the Merck Veterinary Manual or consult with a poultry specialist.
Common Questions
Can I use Corid preventatively?
Yes, at 0.5 tsp per gallon for 21 days, especially during wet seasons or for young birds.
How soon will chickens recover?
Improvement often appears within 2-3 days, but complete the full treatment to prevent relapse.
Can other animals get coccidiosis from chickens?
While chickens have species-specific strains, always practice good biosecurity to prevent disease spread.