My Cockatiels (pixie and Coco) has two babies. One died on his 22 day he was gasping for air and wheezing I talked to online vet and gave him medicines but his condition worsened and he died and second baby died on his 23 day he was fine but when his father fed him he just died in seconds his crop was little swollen and little blood in eyes. I don't know what happened in seconds. Please if you know anything tell me . Please.