can I give curd rice to 1year boy during night time

A. probiotics like curd buttermilk you can give but make sure they are at room temperature and preferably homemade are good After 1 year 9f age, gradually you can start with all the foods you prepare at home ,which are easy to digest ,nutritious, less oily, less spicy. Keep including seasonal fruits vegetables proteins in the diet on regular basis. Keep giving few probiotics like curd buttermilk or yogurt. These are rich sources of natural probiotics.