I just bought 3 laying hens last Saturday, EE, LB and an Australorp. After getting the hens home we noticed that the LB had what i would say is a sneeze or cough. She is eating fine, drinking water and has laid 4 eggs for us. Today my Australorp is coughing and has wheezing or raspy breathing she too is eating and drinking but has only produced 1 egg for us. The EE seems to be fine with no symptoms and has laid 4 eggs for us. What should I do? Do I need to take them to a vet or can I treat them myself. I'm new to this and very worried about my hens. Thanks