A number of restaurants have shut as bosses cite a 'delivery hiccup' and are still investigating how many stores have been affected.
Managers and staff are awaiting on deliveries and hope to be back open soon.
In a statement, a KFC spokesman said: "We've brought a new delivery partner onboard, but they've had teething problems - getting fresh chicken out to 900 restaurants across the country is pretty complex.
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"We won't compromise on quality, so no deliveries has meant some of our restaurants are closed, and others are operating a limited menu, or shortened hours.
"We’re really sorry for any inconvenience, and we’re working to have all our restaurants back up and running as soon as we can!"