I need to look into the dose. I think the dose for poultry might be different, but I'm not sure.Jeffers has it, no script needed. It's very potent at 40%, 1ml per 16 pounds of weight for cattle. Dosage for a chicken should be 1/4ml maybe 1/8ml depending on weight of the bird.
https://www.jefferspet.com/products/sulfamed-250-ml