I'm leasing an Arab mare, and she's just about the hardest thing to care for! She's an easy keeper and all that, but under saddle she is SO prissy! She gets so nice and round and on the bit, but then she just completely looses it and gets so light in your hand you feel like you don't even have a horse anymore. Right now she's just in a medium-width hollow metal loose-ring snaffle. What kind of bit can I put in that will encourage her to take up the contact and go along nicely without needing to pull? I was thinking something copper to help her relax her mouth, but we tried a flavoured copper bit and all she did was chomp, chomp, chomp on it and she wouldn't listen to your reins at all, so I was wondering if this would be a problem with just a normal copper bit? Any suggestions?
Also, she has a slippy saddle (to the side, not backwards so a martingale or breast collar probably won't fix it), and a girth that's too long, so it's a little disasterous at the canter (because we're still working on her actually cantering, not galloping around like crazy!). We now have a shorter girth, but the saddle is still a bit slippy. Is there a saddle pad or something I can use to kind of hold everything in place?