Feather meal prices FOB Mid-South were flat this week and have averaged $512.50 since Jan 12^th. During the same time frame soybean meal prices have fallen from a high of $465 to $438.20 today. The sinking soybean meal market has taken the momentum out of the rally and prices may plateau in the near term. Through the first three weeks of the month, feather meal FOB Mid South is trading at a relative price to soybean meal of 113 percent, three points under the prior three-year average.  Those three points are unlikely to act as a catalyst to push prices higher with momentum…