hello all. a few days ago my hen started sneezing or it at least sounded like a sneeze. i took her away from the flock and put her in a small cage away from the others. ive been watching for other symptoms but nothing has appeared. she just continues to sneeze from time to time, but other than that she acts normal. she eats, drinks, and poops normal and she seems to feel really good. she cant stand being away from the rest of the family but i dont want to put her back in too soon. ive also been giving her a little apple cider vinegar in her water. any suggestion on what it could be and wether or not she' safe to go back to the flock? its been 4 days now any help will be appreciated!!! thanks!!