sad day for a customer

i got a call at 7:30 am this morning to tell me that my one customer bird died i asked what happened this is what i was told when she went to put the bird back in his cage he fell backwards got up went in his cage went and ate some food and drank some water at bedtime she covered the cage up but this morning the bird had died during the night the parents of this bird were first time parents this is the girl who lost her budgies in the house fire i did tell her if she wants another she has one the bird was less then 5 months old