In you peco collar thread you have a little better pic of her standing. Not a full view but better and she doesn't look super skinny from those pics so maybe she isn't too thin or just needs a few pounds but without a full top and full side view it's hard to say. Also encouraging was that you did mention in another thread that someone from an IPO club was admiring her. Chances are if she were extremely thin, he might have mentioned it seeing where he was probably looking closely at her structure.
And if she's got lots of energy, that's a good General sign of health. She is pretty.
"If you can't see his soul when you look in his eyes, then you need a seeing-eye dog"