The bubbles worry me, too. I'd definitely keep them separate. It could be the drop in temp, more sudden than usual, made them more susceptible to something.
Boost their nutrition now - keep them good and warm, a steady temp, make sure they're all eating and drinking. Then go out and buy a good antibiotic or two in case you need it. I usually recommend Tylan and Sulmet. They cover different colds. I'd recommend those two meds over any of the -mycins or -cyclines (read the label for the active ingredient). LS50 is another choice.
Also rule out all things environmental: it should be dry, not dusty, and clean - no mildew - in their area. They should have good ventilation - nice clean air, preferably some sunshine (not too hot) if you can get it - dappled is great.
Tylan injectable is a 3 day treatment in the breast muscle, a different place each day. Ask us if you decide to do this and need the dosage.
On ANY antibiotic, birds need to be on a probiotic as well. Probios (feed store), acidophilis (grocery or
walmart vitamin section), or plain yogurt (only if not using a mycin or cycline drug) daily in a little damp mash at the beginning of the day.
Vitamin A and a general vitamin/mineral/electrolyte solution could be helpful. Vitamin A is good for respiratory illnesses and healing of mucus membranes. The vitamin/electrolyte solution might help if they're not drinking as much because of their drainage.
You can alternately use something like PolyViSol vitamins (not the iron fortified ones) by Enfamil - again
Walmart vitamin section - 2 drops in the beak daily. Then use organic apple cider vinegar in the water (1 teaspoon per gallon of water) to help decrease the mucus in their throats and perhaps their respiratory systems. That also helps breathing.
So would cleaning them with the vicks-like VetRx in their nostrils (swab them), the roof of their mouth where the cleft is, and under their wings so they fume themselves when they breathe at night. Comfortable birds heal better if they feel better and are treated thoroughly. You dilute VetRx, and it's very cheap (under 6 dollars last I checked) for 2 ounces and goes such a long way. It's NOT a medication and won't treat them, but like vicks it will help oxygen getting into those sinuses. That's important.
