This is a new issue we've been having...and since she's barely ever looked at me the wrong way, I'm saying this is fairly serious. Whenever you put the saddle pad and/or saddle on her, she pins her ears and turns her head around to give you the "evil eye". She's tried nipping, and though it's never connected or come near, this is something I'm pretty sure is going to get more and more serious unless I can put a stop to it, and if this doesn't stop I'm probably going to get bit at some point.
Once the saddle's on, she doesn't dance around or misbehave-just stands there with her ears pinned. Once you start to cinch it up, and walk her around to tighten it she forgets all about it and is pretty much back to normal, but it's when you're just putting it on.
I tried giving her a smack early on when she began being witchy, and that never worked so needless to say I don't do that anymore. I've started putting it on, and when she puts her ears forward and isn't being a prick, I'll take it off...and repeat. I don't know if this is the right thing to do, though. I'd say just ignore it and continue on with what I'm doing, but as I said before...I don't want to disregard it if she's only going to become progressively worse. I don't usually throw it on or be too rough about it, and she never retains her pinned ear stance after the saddle's on and we're off, so I'm pretty sure it's not due to pain. We haven't been having the greatest/most pleasant rides of late, so perhaps she's just sour about having to work? I just don't know.