I use Zerobute from Feedmark and have done for nearly 4 years. I have an 18.1 Irish Draught X so he is a big lad. He is doing very well on it, he also has Extraflex by Feedmark, which is helping him stay supple. I have been very pleased with the results.
After seeing her photos - "Aurora's Little Gem. Or with her colouring - Aurora's Little Blue Gem. Or seeing as she is going to be a star of the future Aurora's Little Blue Star. Hope these give you insperation. Good Luck. let us all know how she does.