A bird flu prevention zone has been declared across the whole of England, following cases of influenza found in two different locations.
This applies to everyone who keeps poultry or captive birds, meaning they must follow increased biosecurity requirements.
It comes as 13 dead wild birds were confirmed to have the virus in Warwickshire.
Last week 17 wild birds tested positive in Dorset and a total of 31 infected birds have now been identified at that site.
Chief Veterinary Officer Nigel Gibbens said: “Following the latest finding of bird flu in wild birds in Warwickshire, we are extending our action to help prevent the virus spreading to poultry and other domestic birds.
“Whether you keep just a few birds or thousands, you are now legally required to meet enhanced biosecurity requirements and this is in your interests to do, to protect your birds from this highly infectious virus.”
British Hen Welfare Trust stated: “We welcome the measures being put in place and emphasise that these apply to all backyard flock keepers, whether you have two hens or 20.”
For any further advice visit the Defra website.