The aim of the study was to determine the effect of using the floor gratings in calf hutches on improvement the fare of calves during the period of milk nutrition. The seven calf hutches with floor gratings (experimental group) seven hutches without the floor gratings (control group) were observed for 17 months. We monitored air tempera temperature and dry matter of bedding, average daily gain, health and behaviour of calves during the experime The experimental data were analysed by the Statistica package (StatSoft). The use of floor gratings in the individ hutches during mild winter and transition of macroclimate period led to increase of bedding temperature but there was just a minor reduction of bedding moisture. All these changes caused, that the calves spent lying down about one hour longer.