True if it is an adult however I would not make a blanket statement like that not knowing the age and size of the animal first.
To the OP
Refusal can have been caused by the shed but it can also be cause by other factors.
Can you tell us a little more about your BP (Age/size) and your husbandry (enclosure size, hides, temps, humidity etc)
Have you handle this BP since in your care and if so how often?
The majority of feeding issues new owner experience is often directly linked to their husbandry.