How can i help this duck survive the cold winter?

i live in ohio and right now its really cold, almost below 0. we have a large pond in our backyard and all of the ducks have flew south already, except one. he is a peking duck (i think) and we think that his owner dumped him in our pond because they no longer wanted a pet duck. :( he cant fly south and i feel... show more i live in ohio and right now its really cold, almost below 0. we have a large pond in our backyard and all of the ducks have flew south already, except one. he is a peking duck (i think) and we think that his owner dumped him in our pond because they no longer wanted a pet duck. :( he cant fly south and i feel really bad. his "shelter" is under our patio table on the back patio. we shovel the snow for him and we bought some duck food. under the table we put some cedar or pine (i cant remember) bedding really thick so he will keep warm. is there anything else we can do to keep him warm and help him survive the cold winter? please help
thanks in advance
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