You are right to be worried if she is shuffling or dragging her feet when she walks. She can easily fall and trip on rugs or anything not level on the floor. Weak hips, arthritis, balance or low vision are a few of the reasons she may be doing this. Falls are the leading cause of death, injury and hospital admissions amongst the elderly population. It’s best to get a check up from a doctor to be safe and to eliminate as many trip hazards as possible in the meantime.