One of the horses I recently rescued(last Sunday) doesn't take the bit. I have tried the string trick, which worked but I don't want to do it every time. She will let me put my hand in her mouth, a lead rope, and of course the string. She just refuses to take the bit. She throws her head up every time I put it towards her mouth. I began doing the "mark the wrong thing hard, and the right thing easy" so I make her work every time she throws her head up. It worked a little she lets me touch her nose and her bottom lip with the bit, but she throws it every time it touches her teeth. She backs up also. I know she knows its wrong because I taught her to put her head down and she does it strait after. It's so frustrating. For two years she hasn't been able to get a bit in. I have gotten it in but I don't want to fight her every time. I have a straight bar bit. Do you think she just doesn't like the big metal bar in? Do you think if I get a snaffle she might take it better? I was planning on getting her one just because she is younger and would make me feel better if she had one on sense she is known to get a bit crazy when she is mad. But do you have any suggestions?
I try and make it pleasurable when its in, like giving her grain as a treat, letting her sit with it in for a while(sense its been two or three years) and petting her making me know its alright. Any ideas? I'm just so frustrated. And I'm trying my best not to be. I have no idea what made her like this.