Hopefully someone more knowledgable will come on but I am pretty sure that if she is hourglass shaped ) ( then that means she is probably malnourished. Some are skinny and have a runners body but there should not be an indent on the sides. What food are you feeding? What are the protein and fat content not to mention ingredients? That might be a big factor. Also if she is injured she could just not be eating well and may have to be syringed.