This means around 17 million of the animals would be culled, which could cost the state more than $800 million.
This move has prompted some lawmakers to demand to see the evidence behind the decision.
The UK has removed Denmark from its list of travel corridors after widespread outbreaks of coronavirus in mink farms were reported. "Health authorities in Denmark have reported widespread outbreaks of coronavirus in mink farms, with a variant strain of the virus spreading to some local communities."
Amid the spread of a "variant strain" of coronavirus in Denmark, it has urgently been removed from the UK's travel corridors.
It has been instructed that whoever come to the UK from the Scandinavian country from 4 am today must self-isolate for 14 days in a move done "quickly to protect our country", according to Transport Secretary Grant Shapps.
Not only Denmark, but Germany and Sweden were also removed by Britain from its list of travel corridors. Travelers coming from these countries would have to quarantine on arrival in England from 4 am on Saturday.
Mr. Shapps said: "I understand that this will be concerning for both people currently in Denmark and the wider UK public, which is why we have moved quickly to protect our country and prevent the spread of the virus to the UK."
"Health authorities in Denmark have reported widespread outbreaks of coronavirus in mink farms, with a variant strain of the virus spreading to some local communities."
"The chief medical officer has therefore recommended that, as a precautionary measure, all those returning from Denmark should self-isolate for 14 days."
"People currently in Denmark may finish their trip, follow the local rules, and check the Foreign, Commonwealth and Development Office travel advice pages on GOV.UK for further information."
The second lockdown that will run until December 2 already includes a definitive ban on international travel which means the people in England won't be able to travel anywhere until the lockdown is lifted.
According to the new restriction rules, the government says that those living in England "cannot travel overseas or within the UK", although there are some exceptions such as for work or education.
This is still not known that whether the Government intends to keep England in lockdown beyond the initial cut off, despite Boris Johnson assuring it won't.
Culture Secretary Oliver Dowden appeared on BBC's Question Time where he said that scientific advisers had told ministers the month-long lockdown would be "sufficient to suppress the R and then ensure that we can emerge...at the beginning of December".
"And that is why these regulations, they don't roll over, they expire."
"The Government has to come back to Parliament in order to get a fresh consent and we believe these measures are sufficient," he reiterated.
According to the official reports, the government of Danish has said it would cull all minks to prevent human contagion with a mutated coronavirus, which authorities said could be more resistant against future vaccines for people.
This means around 17 million of the animals would be culled, which could cost the state more than $800 million.
This move has prompted some lawmakers to demand to see the evidence behind the decision.