Ahh thats a shame, they dont really get much use as most of the time you have a useable familiar out for pvm and skilling etc, with legendary pets out the rest of the time. Unless it would be possible to make them legenary pet overrides as they dont attack, so would only need the basic walk, run, idle, dismiss animations they already have?
great question, i've just asked about this internally - turns out it was something that ninja was working on, however it needs some more character & animation work (and then, more dev work). so it's not a super high priority, but is on people's radar :)