Sometimes bps just go off feed, but since he's never eaten for her you should really consider the fact that he may not be eating because his something is wrong with his environment. give us more info:
What size cage?
What's the cool side surface/belly temp?
What's the warm side surface/belly temp?
What kind of thermometer(s) are being used (digital w/ probes, analog, stickons, etc) and where are they placed?
What's the humidity?
What kind of substrate?
What other items are in the tank and where?
If you can provide a pic that would be helpful?
Was the owner feeding live, prekilled or frozen/thawed?
Was the owner having problems with it eating?
Has it been checked for parasites, etc (sometimes a cause)?
Often times if there are probs with the environment they may not eat - and this needs to be fixed because can be causing stress and eventually illness.
Give us more info and we can better help. 
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