I have an older horse. He's recently alone- the other boarders left about 2 months ago. Now all he wants to do is eat in pasture, not be rode, he doesn't want to lunge he'll go about twice around and turn into me and stop. When I take him out he's okay going out- but on way back towards the barn he'll buck/rare tries goes fast if you hold him back or turn him around he doesn't care- he still acts up. I don't know what to do to stop this behavior. It use to be anyone could ride him now just me, and he still does this with me.. I need some advice please.