Kiara does it out of excitement. Yes, I'm trying to keep her feet moving and all but she manages to do it even with the moving feet. She becomes SO excited sometime that she is all shaking and jumping and trying to run ahead and rears sometime. I tried to just lunge her to calm her down, but she keeps going and going and going and going and rears if you try to slow her down... I'm not sure why she's like that some days and it does look strange. Could it be deficit of something in diet may be? Is it anything can be done about it? Any suggestions (including the supplements) are welcome. I do give her half of the portion of Calm & Cool lately, but I don't like the presense of valerian root there frankly.