Boss Ruud Van Nistelrooy admits Leicester's public disagreements cannot happen again.
Mads Hermansen and midfielder Boubakary Soumare argued on the pitch after Fabio Carvalho scored Brentford's final goal in Friday's 4-0 defeat to the Bees.
The second-bottom Foxes go to West Ham on Thursday looking to close the five-point gap to safety after Wolves lost to Fulham on Tuesday.
Van Nistelrooy, who has lost 10 of his last 11 Premier League games, now only wants displays of unity.
He said: "We have to address this type of behaviour.