Well, I don't typically feed during training unless it's a small treat during a break or something. I did give her a small treat, a little apple pellet thing, the first time I put it on her. It just distracted her and made her pushy. I don't want her to relate getting the bridle on with being fed - just like any part of the training. That's the main reason I don't feed-n-train. This filly is smart and if I give her a firm rub and a "Gooood girl" she knows she's done something right! :)
I never really thought a full-cheek snaffle was a harsh bit? No shank, no twist, plus it has the bars which keep the ring from sliding in her mouth. I've always used this bit to soften up my OTTBs and it's worked wonderfully, and I've broken out a couple of young horses with it as well.
Someone suggested that I run a leather strap through the rings of the snaffle and over her nose, so that when I pull back I get pressure on the bridge of her nose as well (like she's used to with a halter). Don't know how I feel about this... I am picturing the strap slipping down and pinching off her air supply, and the bars of the full-cheek getting stuck under it... I don't know. But I understand the concept... any thoughts on this?
Working with your horse should be like dancing: Someone must lead, but you must both work together to accomplish what you want.