I just bought 4 silkies and 2 of them are concerning me. They are 5 and 6 months old. Every now and then (as in one or two times a day), they will do this funny neck stretch with a quick open mouth then a little head shake. It almost looks like a yawn and head shake to wake up type of thing. I thought it was cute at first until I started hearing that it is a sign of illness. One person said MG, another said gapeworm. They have no other symptoms. The first night, one of them sneezed a couple of times but nothing since. Today the other one sneezed once but that was it. My older girls sneeze from time to time and doesn't seem to be a big deal. Just a sneeze, they are all healthy and never a single issue. From what I read, if it were MG, they would have runny noses and runny/crusty eyes and be showing respiratory symptoms. Their lungs sound perfectly clear. No rattling, no rales, no coughing. They have only done it a few "sessions". Each session, they will do it 2-4 times then stop, usually lay down and go to sleep or go grab a drink of water then go eat because they have just woken up. Could this just be yawning? Or is there cause for real concern? I have had them for 3 days now. They are quarantined in the house away from my other flock members. I of course am taking measures to not carry germs between the birds. I would do that even with no symptoms, you just never know and I want to be careful. Thanks for any help!