Coccidiosis is a disease caused by internal parasites called Eimeria. These live inside the cells that line the birds intestine. As they reproduce, they cause bleeding and swelling in the intestines. Birds lose a lot of liquid and cannot absorb nutrients from their food and will soon die if left untreated.
In the absence of licensed alternatives, veterinarians sometimes prescribe drugs such as Coxoid under the 'cascade' to treat coccidiosis in poultry. However, it is only a veterinarian who can advise on such use and we would be in breach of the veterinary medicines regulations and NOAH code of practice by supporting, or encouraging the use of a product on a non-target species.
Coxoid is marketed under the Small Animal Exemption Scheme which covers small domestic pets, including birds, however it is not intended for use with animals producing food. So for chickens producing eggs, it's only your vet who can advise you to use Coxoid in this way, in the absence of other suitable licenced products.
Coxoid comes as a liquid that is administered diluted with drinking water.
Coxoid contains 3.84% of the drug amprolium hydrochloride which is a structural analogue of thiamine (vitamin B1). Amprolium hydrochloride mimicks it's structure, inhibiting thiamine utilisation by the parasite.