I live in Northeast Ohio where it has been rather cool lately. My 7 ducks (2 Welsh Harlequins, 2 Cayugas, 2 Blue Swedes, and 1 Buff Orpington) currently are on Purina duck grower feed. They have been exhibiting the maturing/dominance behavior for at least a month now, but I'm not sure if they will lay eggs yet this year. That is why I am not sure what to feed them. Since the daylight is diminishing, and I don't want to use artificial light, should I continue to feed them duck grower and have oyster shell on the side just in case? Or should I get Purina duck breeder or Layena to feed to them? Thanks for any input.