Add it to the egg food I give daily and the finches eat it up
same from Cali to RI in 3 days. Saved my rooster life from bad URI
Acidified Copper Sulfate can aid in the prevention of Crop Fungus in pigeons, chickens, and other poultry. It can also be used as a preventative and treatment for blackhead in turkeys and canker in chickens. Additionally, can be used as an antimicrobial to sanitize water lines and waterers for poultry.
Instructions
To prevent canker in pigeons, typically 1/4 teaspoon of acidified copper sulfate per gallon of water is used, given 2-3 times per week as their drinking water. (Always consult a veterinarian before administering any medication to your birds.)
Size
16 oz (453.6 g) bag.