Lucian Walcott had never taken his 11-month-old granddaughter to Riverfront Park to feed the ducks. So Tuesday morning was a first for little Sylvia Gault.She watched with wide eyes as her grandfather sprinkled food pellets on a dock and geese came rushing up to eat.“These guys are pretty tame,” said Walcott. “They come right up to you.”While feeding the ducks, geese and fish at Riverfront Park has been a longtime tradition, city officials ask that you not feed the animals bread.