I have lots of chicks. They are a bit crowded. I figure they are stressed more than a few chicks would be. So, I give a vitamin/electrolyte mix after their first week. I change their water every day - electrolytes one day, plain water the next, alternating for about 6 days. I repeat it every few weeks. That's only until they move outside. Then I only give it if they seem lethargic.I think it was on the chicken chick site... But I can't remember what article it was, something about too much of a good thing, I'll keep looking. I did find this regarding electrolytes: https://www.mypetchicken.com/backya...-give-my-shipped-chicks-vitamins-and-H70.aspx It recommends giving only plain water unless obviously distressed.... Edit: Oops, I've been doing it wrong- the sav-a chick website recommends discarding unused water after 48 hours... I can't find the 3 day guideline! Maybe it's something I made up in my head or read on a bottle. What I have found is that people usually don't give for more than a week.