Join Date: Sep 2009
Location: Tampa Bay area, FL
Have you tried getting someone behind her to urge her forward? Not anything serious, just stand and wave their hands. Sometimes my gelding plants his feet when he doesn't want to do something, and it usually just takes someone behind him to get him moving again. His responses are never fear responses though, just plain stubbornness.
Is there any particular reason why she may spook coming through the gate? Is there a tree with low hanging moss, maybe she sees the gate swinging back at her, are YOU nervous about leading her through the gate? Maybe she only truly spooked the one time, which got you tense about the future times, and now shes like "okay, WHAT is going to happen to me that shes freaking out?!?!?!"
Have you looked in to her eyesight? Like you said, its getting dark when she's turned back in, and maybe theres something wrong with her sight to where she can't see in dim or transitioning light. You said that she's nervous about going back to the stables, but not being led out to the paddock (which i would assume is in the daytime). Or maybe you just didn't include that, lol.