she guess gave birthA breed that is severely underweight and in desperate need of a hoof trim?
How tall is she at her withers? Are her eyes blue (they sort of look blue)? If she is short, I'd suspect she has some Nigerian Dwarf in her. If tall, Alpine. But unless you have paperwork in your hands saying what she is (guessing you do not), there can be no true answer to what breed or mix of breeds she may be. All you can be given is a guess.
she guess gave birth
I kept dairy goats for years. What a goat looks like after giving birth depends on the goat. I had does that would look like nothing had happened and others that took at least four months to gain the weight back. I fed my goats plenty of hay and grain and they had free roam of a lot of farm land that didn't get mowed often.Still underweight, and that actually makes it worse. She needs energy to feed whatever kids she produced, so she will lose more weight as she nurses kids. Her hips and spine should not be protruding like that. Her neck is sunken in, lost muscle tone.
For her health, pull any kids and bottle feed them. Start feeding her what she needs. You have to slowly add more grain and whatnot to her diet, so she doesn't overeat and bloat.