At 8 years old, your boa shouldn't be fed any more frequently than every 10 days. Maybe try a medium rat every other time, but only if you think the snake can eat it safely. I don't think you'll have a problem switching to f/t.

He may be small, but I'd bet he's healthy. Would you really rather a ten foot monster you couldn't handle alone? Of course a male BCI probably would never get 10 foot. LOL

I think you should've posted a pic.