Well, I do not profess to be a horse trainer, and no two horses react the same. Have you spent enough time with this horse to have a pretty good idea as to her disposition, and demeanor? If so, that will help tremendously. As for the breaking to lead, the way I do it is to clip the lead rope on, start out to one side or the other, put gentle pressure on the lead rope, and see what happens. If she plants her feet, don't fight her - simply change directions, give a mooch or two, and try again. If she starts going in circles, let her do it while keeping her in small circles. She will discover that circling you is work, and she will eventually stop. If she tries to pull back, get behind her shoulder(that puts pressure on her to keep going forward) and keep her circling. She will tire of going in circles and want to stop. When she does, change directions, put gentle pressure on the lead rope, and try again. When she turns, she will usually take a step or two. When that happens, release the pressure immediately, pet her, praise her, and do it again. I don't use treats, grain, or hay to coax her because that gets her to looking for the 'extra's' and not paying attention to what I'm asking. If she starts backing up, grab her nose/upper lip, put gentle to firm pressure on it, and make her continue to back up until she stops. When she does, release the pressure immediately. Backing up is more difficult than going forward, and she will learn that it's easier to do what your asking. Be patient, be kind, and do not give in to the urge to fight or force her - you will not win in either of those scenarious, and it will undermine any trust that you have established with her. Watch her ears, they are a good indication of where her attention is focused. Also watch for licking of lips, that is an indication of her "thinking" about what you are teaching her. I hope this helps, and I am certain that other members will be chiming in here with more tips. Good luck with your filly!