One of the actions of the project LIFE + NATURE “One deer, two islands” is to do the electrified wire fence. This fence has threads covered by 12 volt-electric current, which has been generated with solar batteries. The function is to do that barrier for deers and protect the cultures instaled for the cattle. It is necessary to say that such fence is not danger for the deer or for other animals of the area. This type of operations passes within actions of the project and thanks to them keep the balance where presence of a deer does not disturb work of the local farms.