About a week ago I got a cockatiel whose name is Charlie. He seemed ok at first but started puffing up and sleeping a lot. Two days ago he started wheezing so yesterday I went to an avian vet. Charlie indeed has an upper respiratory infection so he gave me 21 days worth of doxycycline. His instructions are to give one tablet in 6 oz. of water once a day. I should have asked him if the doxycycline loses potency quickly because I rarely see him drink. I will call there and ask on Monday but I would like to hear how others have fared with this course of treatment and if they saw their birds drink much. In the meantime I have been sprinkling cumin powder and cayanne pepper on his food since they help stimulate appetite and have some anti bacterial properties according to the online research I have done on the benefits of herbs for birds. I have also given him super finely chopped fresh garlic. Charlie has been eating more which is a good thing because he didn't eat as much before and mostly wanted the millet in the mix. He is eating eggfood now as well as some pellets and other kibble that comes in the Drs. Foster and Smith tiel mix. He has been wheezing less the last 24 hours. Even so this is going to be the first day of the new treatment and I know Charlie is not out of the woods yet but I think there is a glimmer of light at the end of this tunnel. Thankfully Charlie is perching well and sleeps on one foot still. I look in on him often and thankfully have yet to see him on the floor of the cage.