Help with improving shape of youngster

[allyspens]

Ok, I have a new yearling filly I want to show next year (she has had an old injury to her cannon bone, fingers crossed the resulting lump will lessen or disappear)
Now, apart from feeding, how do I get topline on her, as I understand topline to be muscle, not fat.
She doesnt naturally have a great topline (or any at all at the mo!) so any tips or help'd be greatly appreciated, as obviously the same principles you'd use with a ridden as regards schooling the muscle on wouldn't be appropriate!
Thanks
   

[tudormanorstables]

I find that a lot of walk is good for muscle tone and practising your show peice. I wouldn't imagine the judge would be looking to much at the topline of a yearling and by next year this may have improved slightly once she has grown more.

[Sarah]

I've found that correct feeding and the exercise they get by living out is fine for a yearling - especially if you can manage to have hilly fields!  Certain bits can be improved by strapping too.

[allyspens]

Hiya yes very hilly fields!
I think it's going to be a matter of time with her, I can wait!
Thanks everyone