Hey Steniljeh, I'm basically going through the same process. However, my adopted pacman is eating. I just did exactly what the owner did when I first got her. I've fed my frog 2 mice since I've owned her and now she's eating worms (horned worms since they're big). I'm introducing her to earthworms tomorrow.

Maybe give them both a mouse each so there satisfied then try introducing new foods? Might want more info though; I'm also new to this.