A CITY swan project is urging people to feed the swans whilst out on their daily exercise. According to The Swan Food Project the protected birds are more hungry than usual due to the high river levels meaning they have to work harder swim in the strong current. A spokesman for the project said: Do take some food with you when you go for your riverside walk. It takes such a lot of energy to swim in this strong current. If you re buying bread for them, buy seeded bread. It has more of the nutrients they need. It takes longer to digest, so they don t get hungry again as quickly.