Hi folks, I purchased 8 chicks from MPC which arrived on June 15th. All are thriving and doing very well with the exception of one of my White Plymouth Rocks, which was pasty-butted from day one and never seemed to get over it. I washed her little backside about three times a day for the first 6 weeks and tried every remedy that all you folks on this forum suggested with no real positive results. When I moved them outside to the coop and run at about 6 weeks I kept up a few of the suggested cures (apple cider vinegar in the water, oatmeal...yogurt) and then at about week 7 decided that perhaps the remedies could be exacerbating the problem rather than helping. I've been having to give her a full bath and blow-dry about once a week since because her backside will become absolutely matted with nasty black clumps of poo. Today I gave her a bath and took her to the vet. He ruled out internal parasites but said, based on the stool sample, that it looked like she had a bacterial infection and put her on antibiotics (Tylan powder). He also suggested isolating her so that I could monitor what she is eating and drinking and to keep from feeding antibiotics to my entire flock. So, my question for you all is whether it is best to keep her completely isolated from the rest of the flock in a big dog crate in my garage or whether I should try to create some sort of auxiliary run and coop within the run and coop I have built for the rest of the flocks. I know chickens don't like to be alone and don't know if the stress of being alone could delay her recovery or "put her off her feed". Suggestions?