Hello. I woke up today to my budgie vomiting. I think. He was stretching his mouth and shaking his head pretty violently. My sister said he vomited. He only did it once though. Then he started being real quiet and not moving around much, closing his eyes sometimes. I was told it could be a yeast infection. I put probiotics and a very little apple cider vinegar in his water but he hasn't really been drinking. Right now he has regained a considerable amount of energy, and is eating, playing, and making some noises, albeit infrequently and a little quieter than usual. His stool is green and solid. I would take him to the vet but because of this whole lock-down thing there are none, I don't know what to do