Hello! My husband and I went to a hatchery and purchased four baby ducklings. We are first time duck parents, but have experience with chickens. Can you help us figure out what type of ducklings we have please? The lady working the hatchery was filling in for the owner, and didn't seem to have knowledge about the ducks. This last duckling is hard to see, but it is yellow and has brown markings including a heart on its head. It is mostly yellow. Thank you for any help or information you can give us.