11 days ago a hen relatively new to my flock had a runny nose and raspy breathing. I quarantined her and gave her sulmet in her water for two days. It took a couple days for her breathing to get back to normal and now she only has a slight amount of dampness in her nostrils. a few days after I pulled her out I noticed another new gal (both from the same place a couple weeks ago) with the same symptoms. So I pulled her as well. She still has the raspy breathing so will stay quarantined until she improves. But, how do I know when I can put the first hen back with the flock? I am not sure what they have. I just had two poultry vet visits, unrelated, so I would prefer to not add a third. I am hoping electrolytes, vitamins, rest and the sulmet will do the trick on the gurgly breathing and snot.