I've been dealing with a sick pullet for weeks now - after posting to Doc Brown's site, he suggested I put her on Gallimycin. I ordered it & received it last night, mixed it up, ran right out & gave her 15 ccs of it via syringe, then several syringe fulls of feed using the Gallimycin water to mix it into a syringable slurry. Went back to the house, and read the back of the label: "Do not use in chickens or turkeys producing eggs for human consumption." "Do not use in replacement pullets over 16 weeks of age." The "nots" were bolded....okay, this pullet is 22 weeks of age - doc Brown knew that, as I put it in the subject line of my post.....what is a "replacement pullet?" Also, I'm hoping this pullet will some day lay eggs for us, although with all the antibioitcs she's gotten, maybe her egg laying equipment has been compromised (?) In any event, can anyone help me understand these 2 comments? Thanks so much!!