It is important to keep in mind that IFD does rely on the assumptions previously stated and that all of these qualities are probably not met in the wild. Some believe that tests of IFD are not executed properly and therefore yield results that appear to follow the prediction but in reality do not.Kennedy, M., & Gray, R. D. (1993). Can ecological theory predict the distribution of foraging animals? a critical analysis of experiments on the ideal free distribution. Oikos, 68(1), 158-166. Retrieved from https://www.jstor.org/stable/3545322 This causes animal behaviorists to be split in opinions of whether IFD is a true phenomenon or not.
