I was just wondering what the purpose is of docked tails on draft horses. Was it to keep it out of the way of the harness or was it simply done for fashion? I know that now, lots of people do it for fashion but I am wondering about the origins of the practice. Also, I attached a poll to see if you prefer a horse with a docked tail or all natural. I prefer them natural because a docked tail makes the horse look unbalanced and plus takes away the only means of pest control they have in the summer.
I think there are certain breeds that don't allow docked tails and certain shows but there are a lot of farmers and skinners that keep all their horse's tails docked. No it is not illegal (in the US anyway, I don't know about AU). I completely agree with you, if you want the tail out of the way, then just braid it up and wrap it.
It is hard to tell from the picture with her being so young. I think you would be able to tell by just feeling her tail. It should come to a rounded point and should be fairly long. At least even with her stifle I would think.