copper sulphate

Hello, I have a chicken with recurring canker, we’ve had some success with metronidazole and carnidazole (Spartrix tablets) but they are losing their impact and I want to try the acidified copper sulphate solution instead. Except this stuff really scares me because I read if you get the...

i have a rooster that currently has a black comb and struggling with breathing. I read I should use copper sulphate in their water. I bought some on amazon and it has all kinds of warnings about being poisonous and wearing protective gear etc... did I get the wrong thing???