Your puppy will eat around 120 to 200 gm of food in a day, which depends upon its activity and health. Chapati and rice will be filler in its diet as they will not provide the nutrition required by your puppy. Dogs are not able to digest the lactose sugar present in the milk properly. Hence it is not advisable to feed them milk. You only need to feed your puppy with Royal Canin food. Labrador Junior is breed specific food which will provide your dog all nutrition required at this age.