Consumers of KFC appear to be going through serious withdrawals, with a number of police departments urging customers to stop calling them over the chicken supply crisis.
One London police department tweeted: "Please do not contact us about the KFC crisis - it is not a police matter if your favourite eatery is not serving the menu that you desire."
A police station in Manchester is apparently receiving similar calls.
About 450 of KFC's 900 outlets remained closed, with a KFC spokesperson saying the disruptions would continue.
"Each day more deliveries are being made," said a spokesman for KFC.
"However, we expect the disruption to some restaurants to continue over the remainder of the week, meaning some will be closed and others operating with a reduced menu or shortened hours."
Around 700 of the chain's British stores closed on Tuesday, which was caused when "operational issues" with German delivery supplier DHL left them without poultry supplies.
"We've brought a new delivery partner onboard, but they've had a couple of teething problems --getting fresh chicken out to 900 restaurants across the country is pretty complex," KFC said when the crisis erupted.
"We know that this might have inconvenienced some of you over the last few days, and disappointed you when you wanted your fried chicken fix."
DHL's managing director of retail, John Boulter, said the delivery firm was working to "return to normal service levels as soon as possible.
"The reasons for this unforeseen interruption of this complex service are being worked on," he added, although did not give the exact reason for the problem.
"We are committed to step-by-step improvements to allow KFC to reopen its stores over the coming days."
