As documents released under Freedom of Information (FOI) laws show, Palmerston, a white and black cat named after former foreign secretary and two-time prime minister Viscount Palmerston, caught at least 27 mice since arriving at his new home in London since he was adopted in April, 2016. /VCG Photo

However, Palmerston recently was restrained because his overweight led to a low work efficiency. British Foreign Office employees were banned to feed Palmerston. /VCG Photo

Most heads of departments said they did not think Palmerston had become fat, but the top leadership insisted that it must be given just the right amount of calories. /VCG Photo

Another foreign office cat, Larry, and Palmerston face off in 10 Downing St in London, England. /VCG Photo