DNR launches investigation into possible intentional poisoning of swans on lake in Waterford "It's a horrible death," said Debbie Carsell who fears that swans that have been found dead at Maceday Lake in Waterford were intentionally poisoned. "They don't deserve that." and last updated 2021-04-26 18:51:32-04 WATERFORD (WXYZ) â "It's a horrible death," said Debbie Carsell who fears that swans that have been found dead at Maceday Lake in Waterford were intentionally poisoned. "They don't deserve that." Carsell first noticed the swans dying when she visited friends who live on the lake in January. To date, Carsell and other animal welfare advocates said they've counted up to two dozen dead, mute swans floating on the lake or on lawns.