Estimating density is one of the important tools for deer management. However, estimation with high precision and accuracy needs enormous effort, and density by itself does not provide information on the relationship between population and its habitat. Therefore, collecting a set of ecological indicators informing on deer-habitat system is essential. To evaluate the utility of deer measurement as an ecological indicator of deer performance, we assessed reactivity of measurements against density declining through culling operation. The relative density was estimated by a bayesian state-space model with multiple abundance indices in the Tanzawa Mountain. We found that body mass for both sexes and all age classes, especially in fawns, increased with density declining, while hind foot length did not change. Contrary to an accepted sequential response at density increasing situation, fawn kidney fat mass was not sensitive against density declining, probably because muscle and bone growth overrode fat deposit in fawn. We suggested that ecological deterioration process and resilience process might not be same, and that establishment of the general model which predicts a sequential response of ecological resilience is necessary to set practical management goal.