Florida wildlife officials say manatees facing starvation are benefitting from a program that feeds them tons of donated lettuce.The program aims to save as many of the large animals as possible as water pollution led to shortages of their favorite food, seagrass.Officials say the human-caused pollution results from activities related to agriculture, waste from cities and other causes.The United States Fish and Wildlife Service oversees the feeding program, which is carried out near a Florida Power & Light power center on Florida's central-east coast.So far, the effort has provided the manatees with more than 25 tons of lettuce.Officials say the feedings usually draw about 300 to 350 manatees per day.Sometimes, as many as 800 show up."We're making a difference," said Ron Mezich, from Florida's Fish and Wildlife Conservation Commission.