Advice please, trotting down hills when not asked

[sherbet]

This could be long so sorry in advance
I have a 7 yr old TB mare that over the last few months has really pushed me to my limits. Would stand ina corner in the school and not move, ram me into the fence I have overcome these problems and now we are back on track in the school even managing a small jump in lesson on Monday.
She has had every sort of check poss and is all clear.
Just before the snow hit we went for a hack on a route we have hacked 100’s of times with company. She has always tried to trot /rush down hills so I half halt and say no, sit tall and make her walk. She normally becomes a tad grumpy but sorts herself out. On this hack she tried to rush I halted etc and she throws a fit bucking on the spot. This happened on all the hills so in end I got of and lead her back as we where on a road with blind corners this is a very quiet road. Then snow hit so did not hack for a week or so. Yesterday I went for a hack same route with a friend walking beside me. Every time she tried to trot friend held her and we stood still then carried on she was not a happy mare!
So advice required please, should I hack her in company and try and keep her from trotting? Should I make her stand then walk on lots of times to help break the hill up? Any other ideas more than welcome

 

[ThePony]

Are you totally sure there is no type of back or saddle fitting prob? Or perhaps her hocks? A reaction like that to walking downhill sounds more than napping tbh.

 

[forestfantasy]

This ^^
Sounds like the saddle isn't 100% right to me

 

[sherbet]

All checks done from where she was napping in school

Think it is just her way of testing me again, need to find the best way to sort this like the school issues

 

[g&tanyone?]

BALANCE! To carry both herself and you down the hill she has to balance herself and they can find it difficult especially if they are a bit green or young! My boy used to put his head to floor and plough down hills ! It's easier for them to plough down them I know it's a horrid feeling

 

[Tinsel Trouble]

half halt is great to help balance, make sure your weight is back and your lower leg is slightly forwards to help you both out. Ifyou tuck your bottom under then you'll push her back end under a little more which should help her out.

 

[Puzzles]

I agree that it's most probably balance - I usually run down hills because it's easier than walking. I don't think she is testing you but if you try to make her walk when she finds it difficult then I'm not surprised she puts up a bit of a fight. Have you tried walking down it sideways/at an angle as this might be physically easier for her?