soggy "down" maladaptive?

["Ken Kinman" <kinman@hotmail.com>]

    Another argument put forward by Feduccia and others is that downy 
feathers would be maladaptive as insulation (soggy feathers result in 
hypothermia at night?) unless it was only on the young and a parent could 
shield the young from getting its down wet.
    How does one best argue against the "downy feathers get soggy and are 
thus maladaptive" argument?
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