My two little bantam Sumatras that I purchased recently (two days ago) have one problem. They sound like they have allergies or a cold. My little hen sneezes every so often, and so does my rooster. When I pick my hen up, and carry her around, she gradually becomes more and more congested. To the point that I can hear the snot in her little nostrils rolling around. Then I have to put her down on the ground, and she sneezes, and walks off, looking perfectly healthy. (Breathing normally.) Besides having allergies, they seem fine, and eat a lot, drink a lot, vocalize and mate... They're healthy, except for their sneezing and congestion. What's wrong? It's winter where I live, and pretty low humidity... They have nice dry bedding. How can I help them?