I live on a farm and I got a pair of Pekin ducklings for Easter. They are currently about a week old. The guy who sold them to my parents told them that I shouldn't let them swim until they are one month of age because thats when they will start making the oil that will waterproof their down and keep them warm. He said baby ducklings usually rub off the oil from mother and since these are motherless I can't let them swim because they will get cold and die. I feel like I am going to mess with Daisy & Duke's psychology if I deprive them of any swimming until they are fully grown. Is it okay to let them swim? Warm water perhaps? Try and dry them off afterwards and make sure they have a warm spot under the lamp afterwards?