It would be worth a try but not sure I'd hold out much hope for one like that which presumably has plenty of opportunity to feed since it would be within it's natural range. It possibly has a more serious issue, bowel obstruction, etc. I had a beardie who refused food and started to waste away, for months under the guidance of a vet we injected her with fluids to keep her hydrated, we attempted to force feed her and she had antibiotics, etc but still one day she just turned up her toes.