On 19 September, the Prussian army arrived at Paris and besieged the city until January 1871. During the siege, the city suffered from cold and hunger. Cats, rats, dogs, horses, and other animals were killed for food, even Castor and Pollux, the two elephants of the zoo, as well as the elephant at the Jardin des Plantes.[136] In January 1871, the Prussians began the bombardment of the city with heavy siege guns, and the city finally surrendered on 28 January.