*LOCAL DELIVERY OR COLLECTION ONLY If collecting, please wait for confirmation email. Chickens with worms may lay fewer, smaller eggs with poor shell colour and strength and pale yolks. Untreated infections may cause weight loss, dishevelled appearance and death. To worm your poultry feed Heygates layers pellets with Flubenvet as the only feed your chickens eat for 7 consecutive days. Eggs may be presented for human consumption during treatment when used as directed, but birds should not be slaughtered for human consumption until 7 days after the end of treatment.