This is a real Blue-Tailed Skink (Skilton's Skink), unlike other skinks I have known!
This might be a Nevada Side-blotched Lizard, or not. Kind of tricky to ID.
A Bonsai update: As of Tuesday afternoon, he's doing well. Much steadier on his feet and more regular (if you catch my drift). He's not completely well, but we don't think he's knock knock knocking on heaven's door either! We are absolutely grateful for your support and kindness.