Re: she hardly ever stands still...HELP
Hey :) I have a three year old, so I know where you're coming from! 20 minute is a looong time to be standing still for a youngster, so definitely have a haynet, and maybe do ten minutes twice a day if possible until she's a bit older? If my boy fidgets I just hold the brush on him, and as soon as he stands still again I take the brush off as a reward.
Its also trial and error - I've found he hatess the brushes I've just gotten him (brand new, darn :( ) but he's much, much better with a sheepskin mitt. I got it from robinsons and its sheepskin on one side and a cactus mitt on the other. Another thing he loves is when I simply wear winter gloves and rub my palms all over him in circles, its more natural feeling for him I think.
My Cob is in mid teens and also used to be awful for it, and I just did the same as the youngster, gradually build up time, make it pleasant, and never groom when you're stressed, as its supposed to be relaxing x