Thanks for all the info. I have looked into a solar charge,r but our feed store was out. So i have to wait a couple weeks till they get it in. Yay boonies.
In regards to the horse being in a small pen, she is in quite a large pen, with my weanling next door, horses across the creek on anothe property. She is actually in a bigger pen then she was in when i bought her, who had her in a 12x20 pen. She is currenlty in a 40x90pen with a 24x12 shed stall.
She has been getting better with the chewing, as i used the soap and the anti chew spray i have found at the tack store.