I recently purchased a saddle for my horse and since then she's acted very oddly when I tack her. She stands fine while I tack her and do the girth, but as soon as I ask her to take a step forward she will suddenly back pedal and once even reared. Then she just stops and looks at me, walks down to the ring fine and acts like an angel all through the ride. I don't get it! My first response is to smack her for being naughty, but I know her old saddle was professionally fitted and the new one isn't so if she's in pain I don't want to panic her. It's only started since I got the new saddle so that is my first suspicion but it fits her fantastically and I use a very heavy half pad as well. And if the saddle bothered her there is no way she would behave so nicely being ridden is there? I also noticed that she is stiffer than normal but its all in her legs and I chalked it up to weather changes aggravating her arthritis. When I run my hands along her back and press she had no reaction whatsoever. Is she just being bad or should I look into getting the saddle fitted to her?