Hi ?. We started introducing colored cabbage (no allergies, it worked …

Hi ?. We started introducing colored cabbage (no allergies, it worked for us), yesterday we introduced broccoli too, it also worked so far, we're watching reactions, now tell me please, will anything be wrong if I give a new product in the morning and the previously introduced one in the afternoon? Is there a normal time interval or should we adhere to any specific time?