i have been thinking about switching from the tsc 16% layer, to purina 18%layer. The purina is 12.49 a bag where as the TSC is 11.49 for 50#'s. My questions are: With living in ohio near the michigan border with a current temp of 20, would the 18% be better for the hens? who are all laying right now! Will they consume less feed seeings as it is a higher protein? If they consume less feed i need the bags to last 2 days longer to offset the dollar difference in brands. Which of the 2 is the better feed?