Feed in the enclosure. At some point she is going to be big enough where moving her means she will bite you - and since it's a food bite it's going to hurt and cause damage. You can put down a paper plate or piece of cardboard so she doesn't ingest substrate.
Also if she eats on a 10-day schedule then feed her on one. Boas have a slower metabolism than ball pythons and don't need to eat as often.