1 / 4   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

2 / 4   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

3 / 4   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

4 / 4   Another foreign office cat, Larry, and Palmerston face off in 10 Downing St in London, England. /VCG Photo