I don't know how you are thawing it out, but my Hog Island acts dumb if the mouse is wet. I have to thaw it out in a zip lock bag and if any water leaks in you can either forget it or he will take FOREVER. He'll grab it and constrict but then won't eat or takes forever.

My KSB on the other hand doesn't care. Wet, dry, moving, totally still, whatever. I think I could put a drawing of a mouse near her and she'd eat the paper LOL

Anyway, just throwing it out there. It took me a while to figure out my hog island requiring DRY food. :-\