Forests are one of the basic components of the natural environment. They create the natural environment for many animal and plant species. Precisely the deer finds there the optimal conditions for the life, reproduction, and shelter. It spends there the majority of life and by its positive and negative activity it affects the forest stands, from the younger to the older age classes. There is damage caused to forestry by the negative activity and these are classified as damage by animals. There is damage at the model area caused by deer nibble. The desire to avoid and eliminate this lies in the accurate and sufficient use of mechanical, chemical, and biological protection. As the intensity of damage has increased evidently in the past years, the protection will lie in trunk binding and in repellent applying. The consistent implementation of the plan of hunting will also be a necessary requirement, as it has not been followed sufficiently lately. The aim of this diploma thesis is the analysis of the damage causes by deer nibble at the model area of the chosen forest stands. Furthermore, it deals with the way of life, the food habits, and claims; and describes types of damage caused by deer. The thesis assesses the hunting management and proposes mitigation measures for damage. Besides, the thesis evaluates the risk of injury mushrooms occurrence in relation to nibble.