You need to train her to
heel. Heeling is the basis of all obedience. Heeling is walking with her head even with your hip.
To do that most effectively you need a way to deliver both punishments (corrections) and rewards (balanced training). Positive only training works on some dogs, but most dogs respond best to balanced training.
Rewards are easy: carry a bait bag (training treat bag). Give her praise and treats when she gives you attention (looks at you) from a position of heel. You can bait her along by holding the treat in your left hand at the position of your hip. Praise is also a reward.
Corrections are easy: apply a leash "pop" (quick tug) and the command "Heel!" when she is not in position. This works for leading or lagging or just haring off in random directions. If she responds to the correction reward with a treat and "Good heel!" while staying in motion.
The major mistake most people make is that they
restrain their dogs. Restraining is not training. It has no training value. It is not a correction, just an impediment. Indeed, it will often train the dog to pull harder! Halti's, Gentle Leaders, harnesses--these are all restraints. You can give corrections with flat collars and choke collars but for dogs with a strong pulling instinct it always turns into a tug of war instead of a proper series of corrections (leash pops), the dog learns nothing and could even be injured.
And that brings us to the, yes, you guessed it, the prong collar. Power steering for dogs. Least likely (after an e-collar) to physically hurt your dog. Delivers a very dog-like correction (bite or nip simulant) just like other dogs give each other. Very easy to use
with the correct owner training.
To do all this, with a prong or any other kind of collar, you need a 6 foot leather training lead,
NOT a Flexi or other retractable leash.
Yes, you can watch Youtube videos on how to train the heel with a prong. However, I am a strong proponent of formal obedience training. This trains
YOU just as much as it trains the dog. Find a local reputable trainer (NOT PetSmartCo). Go observe a few classes and see if you like them and if they are effective (any reputable trainer will allow this, if they don't then move on). Get thee and thine to a class and have fun learning about how to communicate with each other. Because it may seem like I wrote a lot of good stuff above, and maybe I did
, but there is a TON more stuff that goes with heeling and training in general and we aren't going to cover it here.