What breed is your dog?
How old is she?
How long has this been going on?
Does she have a limp?
Is she lethargic?
Can she lift her head to look at you?
Are there any sores, bites, lumps that you can visually see?
how much does she weigh?
Any other issues with other legs?
How is her appetite?
Any vomiting or diarrhea?