He said there is "an infatuation" with starch in dairy rations as a result of years when corn was relatively cheap. While he noted that corn was once one of the cheapest digestible nutrients, cows do not have a specific dietary requirement for starch.

"It is highly fermentable, but some of the guidelines from years ago are no longer applicable," he said. "You need to look at other sources of digestible nutrients, for example, digestible fiber."

St-Pierre said the bottom line, when it comes to the bottom line, is that dairy farmers must adapt their thinking to improve productivity and enhance profitability.

"Things will evolve. Our knowledge and science will evolve, and producers need to evolve as well."