As long as it's a healthy, appropriate prey item Aleesha I wouldn't particularily worry about it with a boa. As Becky says Rauri will happily eat pretty much anything. Heck Rauri used to hang out on our glassed in front porch with us and glare at the large squirrels that ran all over our yard in Michigan. I miss that big fella for cleaning up my own rat feeders that outgrow the BP's size ranges. Severus, Luke's yearling BCI, came to us a lifelong mouse eater. Took him oh about a nanosecond to switch over to eating rats LOL.
As your boas grow of course you're going to have to look to something much larger than mice (which will likely be pretty soon LOL they tend to grow like the wind at least Severus sure is and I don't think big Rauri is quite done growing either). The nice thing is you may find f/t rats to be a good option costwise as well as locating a meat bunny breeder nearby. I know neither Rauri or Severus seem to care whether it's live, f/t or p/k as long as it's dinnertime.