Since the spoon you feed the child with has his or her saliva on it, it is not the best practice to save any food that this utensil touched. A good rule is that if the feeding utensil went in the mouth of the child and into the portion of food, then it must be finished or tossed out. This is the perfect place for germs and bacteria to thrive. This will encourage parents to take out only small portions for feeding the child each time.