I ended up starting Marion (the BCM) and the tetra on the Tylan 50 this morning. Marion's swelling has spread to the other side of her face (although her other eye has not started to puss), the tetra does not have any further swelling, but I figured I'd start both to be safe. They still do not have any nasal discharge of any sort, nor do they sound raspy or congested. They are also getting the save-a-chick electrolytes in their water, and I've moistened their food with the mixture instead of their normal fermented feed. Any other suggestions to make them more comfortable, or to help with healing, would be appreciated.