I have a budgie and cockatiel that get frequent infections, usually yeast. I have been guilty of not keeping the cages clean in the past but I've been trying to do better and they're still getting sick. My girl cockatiel acted like she was going to throw up the other day but nothing ever came out. She seems to be doing well now. My boy budgie has been sleeping a lot and has a bulging crop. Sometimes he sneezes and has some discharge from his nostrils. He will also regurgitate on the rim of his feed dish. The last time they did this I took them to the vet and she kept them a few days and said they had mild yeast infections which had cleared up with acv water and probiotics. If it's something mild can I just do what the vet did and see if they get better? I will ask her when it's day but I was curious to see what you guys say. The only thing I worry about with the acv water is whether they drink enough. The budgie doesn't drink a lot to start with and there's no way I can watch him all day to make sure he drinks. I don't want to make them sick trying to get them better. If I do use probiotics what is a good one? The vet sent me home with dog and cat probiotics which I thought was weird, but she has done really well with my birds. I would take them right to the vet but a $100 bill and 2 hours each way trip gets expensive really quickly. Right now he's jumping around like a typical little bird on crack budgie but I know they do tend to hide illness and he's definitely been sleeping more. Any advice?