"what a star"

"*What a star*. They're just precision engineered and the screws cost six pounds, so he's got about a hundred pounds worth of implants in him"

this is said during operating on a dog and the vet is talking about a plate put into his bones.
I don't quite know to what she refers in "what a star". is it the precision she is admiring, or is it the dog?

thanks a lot

Sorry. I can't tell from what you've posted. Generally, an inanimate object (like a screw) wouldn't be called a "star." So it must be the dog. But it still doesn't sound right.