| Hydro-Hen 3-in-1 Water Supplement, 8 oz. Everything they need in one scoop. Manna Pro Hydro-Hen contains probiotics, electrolytes, and acidifiers to provide hydration when your birds need it most. Hydro-Hen offers an acidifier which supports nutritional absorption within the digestive tract... ... more Hydro-Hen 3-in-1 Water Supplement, 8 oz. Everything they need in one scoop. Manna Pro Hydro-Hen contains probiotics, electrolytes, and acidifiers to provide hydration when your birds need it most. Hydro-Hen offers an acidifier which supports nutritional absorption within the digestive tract... Petco.com | | $7.99 go to store |