If you have a small pen or cage you can put her in so she can't run and jump, that will help. She should still be able to hear and see her friends while in the hospital cage. Give her baby aspirin in a treat two or three times a day. If you can identify where the injury is, (foot, leg, etc) soaking in warm epsom salts soak can help. It might take a while before she is not limping. Feel gently along the leg, foot, toes, to look for heat or swelling. There might not be any but it could still be a sprain. also feel her hips to see if both feel equal and normal.