last week first thing in the morning my 4 mos australorp pullet started making an odd crow/honk/bark sound. Took her to the feed store thinking she was a he; but confirmed she's a pullet. By evening, she began twisting her head oddly with the noise. It continued through the night and finally at 4:30a.m. I took her from the coop, where she had been on the ground rather than roosted. She smelled, and I noticed white residue around her vent; so cleaned her up and laid down with her for an hour. Dosed her with ivermectin in case of gapeworm. Visited the vet, not sure what's wrong, he injected her with antibiotic and we have now completed a week of Baytril50mg daily by mouth. We have been giving her water via the medicine syringe, she wasn't drinking until yesterday, and she took some crumble today. We clean her vent area daily of white residue. The noise is less frequent, and she seems to be feeling a little better. Vet okayed her spending some time in the hen yard, but she honks almost constantly when outside; so she is mostly isolated inside. Any ideas what we may be dealing with? Continued treatment? Hopes the honk/crow/bark will subside? This is our first sick chicken, and I'm worried about the flock.