Every new flock gets what the last one had: coccidiosis at three weeks, then respiratory trouble. Medication helps, but a flock later it all repeats. Often the cause isn’t the birds but the house: pathogens survived the “cleanup” in cracks, under old litter and in the drinkers. Cleaning and disinfecting between flocks is the cheapest prevention there is — but only if it’s done completely.
Why disinfection alone falls short
Most disinfectants lose their strength on contact with organic matter: droppings, dust, leftover feed. Spray a dirty surface, and the product is used up on the dirt while bacteria and oocysts underneath survive. That’s why the standard poultry routine has four steps, and disinfection is only the third.
The four steps
- Dry cleaning. Remove the birds, then the feeders, drinkers, nest boxes and perches. Clear out litter, droppings and leftover feed, and sweep dust off beams, lights and fans — top to bottom.
- Washing with detergent. Wash walls, floor and equipment with hot water and detergent, ideally with a pressure washer. The goal is to remove every bit of visible organic matter. Soak equipment and scrub it with a brush.
- Disinfection. Treat the clean surfaces with a product registered for poultry houses, at the concentration and contact time on the label.
- Drying. The house and equipment must dry completely. Industry research shows 48 hours of drying cuts contamination far more than 24.
A film builds up inside drinker lines that you can’t see from outside, and bacteria live in it. Lines are flushed and treated separately — see the article on water quality.
Downtime
Once dry, the house is left empty. Canadian guidance for small flocks recommends at least 7 days of downtime, and preferably 3 weeks or more: the longer the house stays empty and dry, the fewer pathogens survive. “All in, all out” means one flock of one age goes into a house, and the next only after a full cleanout.
Special cases
- Coccidiosis. Oocysts resist most ordinary disinfectants; you need a product with a stated effect on oocysts and, above all, thorough dry cleaning (on coccidiosis).
- Red mite. Survives an empty house for months. Seal cracks and use an acaricide (on red mite).
- Earth floors. They can’t be washed; the top layer is removed or limed on the vet’s advice.
- Avian influenza or another serious disease. Cleanup only as directed by the veterinary authority (on avian influenza).
How to check the result
- inspection in good light: no visible dirt anywhere, especially in corners, under feeders and on beams;
- on a larger farm, surface swabs sent to a lab;
- comparing flocks: first-week mortality and disease frequency before and after the cleanout was done properly.
Safety
Disinfectants are caustic. Wear gloves, goggles and a respirator, never mix different products, and don’t put birds back before the time on the label.
Cleanouts in your records
In EggPulse a flock closes with its removal date and the next one starts with its placement date — the downtime between them is visible at once. Compare first-week mortality across flocks: if it’s lower after a full cleanout, you see what the cleanout is worth in money.
