You could try putting electrolytes in their water. How are they acting? Are they eating/drinking? Are they too cold/too hot?
From a BYC paige:
Homemade Electrolyte Recipe for weak/ill chicks
2 C. Water
2 TBL. Brown Sugar, honey or molasses
1/2 tsp Salt
1/2 tsp. Baking Soda
Mix until all dry ingredients dissolve & Keep refrigerated
You could also use electrolyte drinks Gatorade or Pedialyte, or
3 drops of POLYVISOL (liquid childrens A-B-D vitamins)
Slowly drip along inner edge of lower beak.
From a BYC paige:
Homemade Electrolyte Recipe for weak/ill chicks
2 C. Water
2 TBL. Brown Sugar, honey or molasses
1/2 tsp Salt
1/2 tsp. Baking Soda
Mix until all dry ingredients dissolve & Keep refrigerated
You could also use electrolyte drinks Gatorade or Pedialyte, or
3 drops of POLYVISOL (liquid childrens A-B-D vitamins)
Slowly drip along inner edge of lower beak.