Any Help is Appreciated...

O.K.
Now that the rain is supposed to slack off for a while, my new romance is settling in quite nicely, and the kids will soon be done with school and all the extra activities that go with that (the only thing left is Fair in the beginning of June) so; it's time for me to start getting serious about putting some hours on Little Bit!
I have neglected her for quite a while now. We still have our feet sessions, typical everyday grooming and general social lessons (i.e. leading, space and touch) we even moved on to noises! She is not spooky of a whole lot....just one thing is fatally threatening her life.... the dreaded PLASTIC BAG!!!! I swear she actually attacks them. The mistake was made late last year when we were going to place new shavings in her stall while she was eating. The bag was put in and she proceeded to paw, well rear up and attack, the bag. I have NO idea what brought it on. She has seen us put these same bags in other stalls all around her and the other horses reactions to them (none). She is mortally afraid of anything plastic. I have no idea what was done to her before She was adopted by me from the BLM, but I would be loathe to think anything untoward would have happened. Maybe a bag was caught on the trailer transporting her, maybe some little kid thought it would be funny to shake a palstic bag at the group of yearlings she was in to get some kind of reaction; I honestly have no idea. I do know, however, I do not want to be on her when one blows by or someone walks up to her carrying one.

Any advice would be greatly appreciated in this area. We, my Mother and I, have been trying to "sack her out" (rubbing her with one, placing it on her stall while eating and even tucking it in my back pocket while leading her) but to no avail. She still will not stand still nor let us get close enough for any length of time for her to see it's not going to eat her! We dance all over the pasture for about 10 or 15 mins. before she will let me touch her shoulder with it and even then it's very grudgingly done. She stands shaking like a leaf and keeps a wary eye on not only the bag but me. I fear it my jeopardize Our relationship as far as her trust in me goes.

Her ground work will begin anew in about another week and I am hoping this will be the toughest hurdle we have to face. I have set my goal high and want to be riding her by the end of the summer this year.