Hey, I keep BRNs too.
They get 90 percent rodents. They are doing fine.
My adults would occasionally still eat crickets. But only if I hadn't fed them in like, four days. You can worry about them eating insects if you want, but IMO, its nothing to worry about. I'm sorry my animals aren't 15 years old yet, so I could offer some proof that rodents are a spanky diet. Someday.
My animals, including a hatchling I had, turned their noses up at mealworms, superworms, waxworms, and silkworms. They eagerly eat scrambled eggs, BBQ chicken, ground turkey, strips of steak. They eat it to amuse me, though, that stuff isn't a wholesome diet all by itself. They are my garbage disposals, anything (meat and egg-wise) in the fridge I've had too long, they get.
If you have one, could you post some pics of your BRN? They all have different head shapes, its interesting to see the differences. Thanks. D.