What a strange box.
It says 5 mg per mL
Net contents 250 mL (8.5 fl oz)
All of my ivermectins I buy in Peru the box says Ivermectin 1% or Ivermectin 2% and the dose is super low.
Ivermectin works at a very very small dose, so your Ivermectin is 5x stronger at 5% than what I can buy. And for a chicken a dose is measured in drops.
So you would dilute it quite a lot to dose 1 chicken with a couple drops. And Ivermectin is really hard to mix with water depending what the other 95% of the liquid is too.
It becomes more and more mpossible to administer this medicine the higher the volume of water due to the ridiculously small dosage ivermectin needs. I mix it in 10mL syringes and it doesnt mix well at all.