Is there anything I can use topically to temporarily replace the feather oil while I wait for the duck to preen itself back to normal? I have done the bath and blow dry, but the feathers still keep getting damp, he is in a heated coop, not with a heat light. It's been 5 degrees in the mornings the last few days, I just keep bringing him in and repeating the treatment, I'm thinking a natural oil like olive oil, but don't want to do anything harmful, any ideas would be appreciated.