Four zookeepers took turns bottle-feeding the cub with 140 milliliters of artificial milk every four hours[9] and news of her eyes opening for the first time made headlines a few days before she was officially named.[10] At five weeks old, she was referred to by the publication Bild as "Mrs. Knut", suggesting that the two German-born polar bears might become mates when they mature.[11] As she grew, Flocke's diet was enriched with dog food, and boiled bones were supplied for her to chew on when she was three months old.[4] She was soon taken to the zoo's beginners' pool to practice her swimming skills.[12] The zoo had previously stated that they were seeking another orphaned polar or brown bear cub to raise alongside Flocke in order to improve her development.[5]