Chickens, ducks, geese, guinea fowl and many other birds are susceptible. It can affect free-range and caged birds, as well as wild birds.
Botulism occurs when birds eat food or drink water containing botulism toxin.
The toxin is produced by bacteria called Clostridium botulinum . These bacteria are commonly found in the soil, and thrive in rotting vegetation, food or carcases, where they produce a very potent toxin. The toxin acts on the nervous system of poultry and causes weakness and paralysis. Botulism tends to be more common in the wet season, because birds are more likely to have access to wet, decomposing feed. Symptoms of Botulism Usually affected birds are found sitting or lying on the ground, hunched over and unable to stand.