I bought a 6-month-old Silkie about a month ago. I noticed it sneezing on day 1 so I quarantined her and eventually gave her 5 days of Tylan. The sneezing improved but never totally went away. I took her to the vet because she had loose stool and was told she had roundworms. I gave her 5 days of Panacur, am now waiting 10 days to give another round of Panacur. The vet assured me that I could go ahead and reintegrate her with the flock after 5 days of Panacur even though she was still sneezing some. Well, sure enough the rest of my Silkies are now sneezing! I’m so upset because I saw this coming but the vet convinced me it would be fine. They have no other symptoms. Should I just keep an eye on them to see if more symptoms develop or is there something I should be doing?