Hi, I recently acquired a pair of Swedish Flower pullets, as well a few other breeds at the same time and from the same breeder. Both Flowers are from the same hatch. Have had for approx. 3 weeks and they are now approx 14 weeks old. The one smaller bird has been very aloof from the day I got them. All the birds have been segregated from the rest of the flock. The one Flower has almost doubled in size while the other has grown slightly. The lethargic smaller bird exhibits no natural fear, She just stays off by herself and stands with her eyes closed a lot. She has begun making a sneezing and what I can only describe as a choking sound. Almost like a cough. This happens every few minutes. The past few days I have taken to feeding her separately from other birds as she seems too timid. I've been giving her soft fruits and veggies as she doesn't seem to want the crumbles. She has been taking water from nipple waterer's so I don't think dehydration is an issue. At night, she sleeps with all the other pullets and doesn't have a problem getting picked on or thrown out. I check on them every night and integration is fine.
Her poop is runny, if that helps at all. Don't know if I should try antibiotics or just isolate her and give her vitamins in her water. Any advice would be greatly appreciated.