I agree with moving up to adult mice. My girl is only 3 months old, and is pounding adult mice. You will be surprised what they can take in. I cant recall if you feed live mice, but I would suggest getting F/T (Frozen/Thawed) to eliminate the risk of your BP getting hurt/bit. If you try and search on that topic, you'll find a good bit of information. But thats just my opinion. Good luck!