Worms rarely kill birds outright. They quietly steal feed: the flock eats as usual but grows worse, lays less, and the feathers look dull. That’s why worms are often noticed only once there are a lot of them. The usual advice — “deworm every quarter” — is simpler, but not better than a test-based plan.
Common worms
| Parasite | Affects | What it does |
|---|---|---|
| Roundworms (Ascaridia) | Chickens, turkeys, ducks, geese | Large worms in the intestine, slow growth, intestinal blockage in heavy infections |
| Caecal worms (Heterakis) | Chickens, turkeys | Small caecal worms; carry blackhead to turkeys |
| Capillaria | All species, quail in particular | Thin worms in the crop and gut, diarrhea, wasting |
| Tapeworms | All species on range | Weight loss despite a good appetite; picked up from snails, ants, beetles |
| Gizzard worms (Amidostomum) | Geese | Worms under the gizzard lining, dangerous for goslings |
| Gapeworms (Syngamus) | Turkeys, chickens, pheasants | Worms in the windpipe; birds gape and “sneeze” with neck stretched |
Signs
- the same feed use, but lower gain or laying;
- pale combs, dull feathers, thinness despite a good appetite;
- diarrhea, sometimes with mucus;
- worms or segments in droppings — by then the infection is heavy.
Other diseases show the same signs, so a test is the reliable way to know.
Fecal testing
A vet lab examines fresh droppings by flotation and finds parasite eggs. Collect samples from different spots in the house into one bag, fresh. The test shows whether there are worms, which kind and how many — and that determines whether to treat and with what.
A schedule
- Birds on range — test every 3–4 months, always in spring and autumn.
- Housed birds without a range — less often, once or twice a year, and when signs appear.
- New birds — test and treat if needed during quarantine, before they join the flock.
- Treat the whole flock at once, not just the thin birds: nearly all are infected.
Drugs
The vet chooses the drug and dose based on the test, the species, and whether the birds are laying. Most dewormers have a withdrawal period for eggs and meat, and some can’t be given to layers at all. Frequent “just in case” treatment with the same product makes worms stop responding to it.
Avoiding reinfection
- After treatment, replace or thoroughly clean the litter: it holds the expelled worm eggs.
- Rotate runs: ground without birds gradually clears.
- Don’t keep drinkers and feeders on the ground where droppings foul them.
- Fight damp: worm eggs survive longer in wet soil.
Test, treatment and withdrawal in one place
In EggPulse lab results go into the lab log, and deworming is logged as a treatment with a withdrawal period. You see when the last test was and when the next is due, and eggs under withdrawal don’t go on sale.
