I have two hives that I started on Pierco frames last year. They both made it throught the winter . One is really strong, one is a little weak. Both of these hives had a little trouble last year and some of the frames are not fully drawn. The partially drawn frames are about 2/3's drawn and the comb tapers off to bare plastic foundation.Will the bees "finish" drawing these frames this year? Should I do something to encourage them to complete the frames that are only 2/3's drawn? Should I pull out the partials and replace them with foundation? Not sure what or if I should do something.