We did this a few years ago. Mummy hen was utterly traumatised when her babies started swimming, and was frankly never the same again. Also the drakes all had something Freudian going on, and only ever fancied hens.
Of course a hen can run faster than an amorous runner duck, but we did used to sing the Benny Hill music when it happened

.
So yes, go for it, but you have been warned!!