My 10 week old silkie has been panting when she comes out of her pen, so I thought it was stress, but in the car she will also sneeze and open her mouth wide and stretch out her neck. It also sounds like there could be a faint popping sound, but i haven't put my ear to her face to see if that is where it is coming from. Could she have a cold? There is no discharge from her nose, and she is eating and drinking fine and makes a lot of noise. If need be I can take her to a vet but does anyone have any suggestions? I just got her a couple days ago along with 2 other younger silkies.