The Meat Industry Association-owned company which promotes the control of sheep measles is advising farmers to make sure the dogs of their duck shooting friends, have been treated with the appropriate tablets.
Sheep measles is the common name given to hard lesions or cysts appearing in the meat, caused by a tapeworm parasite.
Ovis Management project manager Dan Lynch says the generosity of sheep farmers letting duck shooters onto their properties can come back to haunt them when meat companies list sheep measles on a killing sheet, as a reason for downgrading lamb carcases.
He says dogs can still be shedding tapeworm eggs up to 48 hours after they have been dosed.
Mr Lynch says that means it's important all dogs, which duck shooters use to retrieve the birds, are treated for sheep measles more than two days before the duck shooting season starts on Saturday week.