"When we force-feed ducks and geese and we stop the force-feeding, the liver recesses to normal, " Daguin says.

CNN: Foie gras causes uproar

While it doesn't affect birds that feed at sea, which is the vast majority of birds around the island, it could harm those that feed on land, such as ducks, gulls and skuas.

WSJ: This British Assault on an Island Off Argentina Is for the Birds

The family of a five-year-old girl killed on her way to feed ducks have said they feel more could have been done to prevent her death.

BBC: Lily-Mae Jeffries' Weymouth crash death ruled accident