I agree 100%. Security is a BP's #1 concern and larger or glass enclosures stress many BP's and cause them to go off feed. If you don't go to a smaller tub (which is what I reccommend) I would fill the enclosure with crumpled newspaper so she can hide in her hide without any view of her and leave her for a week. This will make her feel more secure. BP's are most vulnerable when feeding and if they feel vulnerable already they wont eat.
Also try rat pups instead of mice, some BP's may prefer one over the other.