You little one looks adorable! But here's just a few things I've learned myself over time.
1. If you feed live, you have to keep a close eye on the snake and mouse. I know everyone had told you that, but my snake ended up getting bite in the eye after a live feeding. She got the rat back good (by eating it), but even then, it was still an accident due to live feed (also, the accident happened while she was constricting).
2. Is that the reptile bark you're using? While I know every one has different opinions on it, I would personally suggest picking up a can of Provent-A-Mite (PAM). I use to have that in my snake enclosure, and she got mites. Currently I use cypress mulch, and it works wonders for me.

Anyways, those where just my own two little tips/pointers. I'm no expert, so don't take everything to heart. I've only owned my snake for three months, but I've learned so much from her, and from here.