can you feed black oil sunflower seeds to ducks or are them a choking danger like legumes? When in doubt look at the Ultimate Ducky Treat post..... "Seeds- *** Some seeds can be given to ducks, like Millet or Sunflower seeds, as a limited rare special treat. While seeds can be used like grit, seeds do not digest well. Too many seeds can impact the crop and fill with material that can not be digested or passed. Then there's less room for good foods and digestive problems can occur. Remember that some seeds, like apple or cherry seeds, are toxic to ducks."