Hi, This is my first post. I have 6 baby chicks that are 3 1/2 weeks old (1 BO, 1 GoldSexLink, 1 Black Australorp, 1 Barred Plymouth Rock, 1 California White and 1 Rhode Island Red) and another 3 that are 1 1/2 weeks old (1 Ameraucana, 1 Silver Laced Wyandotte, 1 Welsummer). I had another from the younger group that only lasted 6 days. It got very lethargic and eventually died. I got "Farm Boost" (electroylytes vitamins) and put it in their water. I wasn't so much worried with my older chicks until yesterday when my Rhode Island Red who is 3 1/2 weeks old got really lethargic and is predominately keeping her eyes shut. Also, a Golden Sex Link that is the same age is now double her weight and size. I do see her eat and drink but she's just so lethargic and not curious like the others. Any advice? She was fine until recently. And also, I have a 1.5 qt/liter water container. A lady at a local feed store said to put in 1/4 teaspoon of the Farm Boost. The bag's directions are impossible to figure out for a small amount. Any advice on the exact amount would be appreciated too. Thanks!