I brought my son in to the ER when he was 6 months old for the barking and this was the advice that they gave me... their airway is swollen, hence the barking, so they told me to try these things in this order 1. bundle them up and take them into the cold air to breathe for about 10 minutes. 2. If the air isn't cold enough, open the freezer and have them stand in front of that. 3. If the cold air doesn't work, run a hot shower, close the door and have them breathe in the hot steam. 4. If the coughing doesn't minimize at all, take them to ER for a steriod treatment which should last about 3 days, hopefully getting them past the coughing part of the virus and giving them the relief that they need. You can also put a humidifier in their room at night, which helps a lot. The way that the ER doc explained it to me is that it is just a virus, which 10 different kids can get, but it will effect 1-2 this way... which is so true. When I had to take my then-6 month old in, my older son had it earlier and he had the typical cold, but my younger son got this bark... It just effects each child differently, and they told me not to be surprised if my younger son gets it this way a lot (great!) It's such an awful son and so hard to wathc them suffer! You just have to wait for the virus to run its course and watch for them having difficulty breathing... the airway IS swollen and can get too swollen that it causes MAJOR problems. Good luck and I hope that they feel better soon!