That sort of thing is so often a waste of money. What is in them? You might want to research the ingredients to see what you are givig them, and to give you something specific to check out.
From the name, it sounds like they are an electrolyte supplement, usually sodium and potassium, which your flock should be getting in ample quantity in their regular diet if they are healthy. Occasionally, people and animals can benefit from an electrolyte solution for a brief period after vomiting, diarrhea or other heavy fluid loss. It's also something you can give too much of.
