On September 26th 2011, on farmscape.ca radio, Dr. Ruurd Zijlstra of the University of Alberta discussed the effects of lentils in diets:

Due to excess lentils after the 2010 harvest, tests were carried out by the University of Alberta to see the effectiveness of lentils in weanling pig diets. Results show that a diet with up to 20% lentils had no negative effect on pig performance. Researchers found that the pigs enjoyed eating lentils so there was no change in feed intake. Further testing found that pigs on a diet with 22.5% lentils had no change in average daily gain or feed efficiency, but when pigs were fed a diet that consisted of 30% lentils there was slight negative effects on average daily gain and feed efficiency. This led to belief that the appropriate percentage of lentils in a diet is around the low to mid twenties.

To listen to the interview click here: Lentils Shown to Be Good Protein Source for Weanling