Take her to dog classes she needs to integrate with others thus allowing appropriate play collie dogs need alot of simulation.
Separation anxiety. More than most other breeds, Border Collies need a great deal of companionship and do not like being left alone for more than a few hours. They become anxious, which they express by chewing and barking. If you work all day, this is not the breed for you.
Border Collies are one of smartest and most capable breeds in the world. Many are eager to please and learn very, very quickly. But many Border Collies are very difficult for the average person to train.
Some are manipulative, i.e. using their intelligence to get YOU to do what they want you to do.
Some are willful and dominant (they want to be the boss) and will make you prove that you can make them do things.
Many are so sensitive that if you correct them too harshly, they may freeze and "shut down."
Finally, many Border Collies are frustrating to train because they're hyper-reactive to the slightest sound or movement you make. They are "anticipators" who keep trying to guess what comes next. They will sit, or lie down, or run toward you, or run away from you, when you simply open your mouth or lift your hand. Their reluctance to remain still and wait for your actual command can drive you right up the wall.
HTH