Sarg is 20 years old. Never had a problem with him til last year at this time. This year it happened again only worse. I took him to my vet and she sent me to an avian vet as he was throwing up yellow liquid. The avian vet did blood work and gave him an antibiotic and wasn't sure he would make it. I took him home and gave the antibiotic as told. That night he slept with me to keep him warm and did not move. Since then he has gotten more active and is preening again and talking. I had him back to the first vet for x rays as he was not eating. The bloodwork and the x rays were all fine. The only thing I haven't received back is the gender test. So I do not know if its a boy or a girl. I have been syringe feeding him. However I have been told several different amounts to feed him and how often. Any advice would be greatly appreciated