Repeatable behaviors (i.e. animal personality) are pervasive in the animal kingdom and various mechanisms have been proposed to explain their existence. Genetic and non-genetic mechanisms, which can be equally important, predict correlations between behavior and body mass on different levels (e.g. genetic, environmental) of variation. We investigated multi-level relationships between body mass measured on weeks 1, 2, and 3 and three behavioral responses to handling, measured on week 3, and which form a behavioral syndrome...