The critters are now turning to our busy homes to hunt for richer pickings.
Rodents are eating their young as they scrabble for food while city centres and restaurants remain shut.
It has long been known that starving rats will eat their young, and during coronavirus lockdown, the worrying phenomenon has been spotted more and more by Brits stuck in their homes
Expert Steve Belmain, from the Natural Resources Institute in Kent, said: “Mothers will eat their young in the hope of being able to reproduce again.
Cannibal rats are on the rise across Britain as the desperate vermin turn to human houses to try and find some much needed grub during lockdown.
Rentokil has reported an 80% rise in demand as rats crawl up drains, gnaw through plastic piping and swim into toilet bowls.
Back in April, reports in New York first documented the strange behaviour among the huge rat population there.
Nick Woodroffe, from Derbyshire-based Peak Pest Control, said: “Our customers have all commented on how much braver and more brazen the rats have become.”
“If there’s not enough food to take care of herself, she won’t kill herself looking after them.”
Bobby Corrigan, a rodentologist, told NBC News rats were moving into new territories causing widespread rat civil war as they battled to claim the best feeding grounds.
“Some jurisdictions have reported an increase in rodent activity as rodents search for new sources of food.
In the notice, the CDC said: “Community-wide closures have led to a decrease in food available to rodents, especially in dense commercial areas.
And then in May, more worrying signs were spotted when America’s Centers for Disease Control put out a nationwide alert for “aggressive rodent behaviour”.
“Follow established guidelines when cleaning up after rodent infestations to prevent exposure to rodent-borne diseases.
“Environmental health and rodent control programs may see an increase in service requests related to rodents and reports of unusual or aggressive rodent behaviour.
“Fleas are common on rodents. In area of heavy rodent infestations, workers should consider using a repellent.”