Why is the pearl bird vomiting?

Pearl birds are usually caused by disease.It itself is a bird -like bird. Usually it mainly feeds valley and dumplings. The two must be mixed at a ratio of 6: 3, but when estrus, you can feed some egg rice.Make a tap water every day to keep the water clean and hygienic to avoid birds from getting sick.In addition, prepare a bird's nest, so that the birds can live in it, which is conducive to its winter and reproduction.