fa·mil·iar (
fə-mĭl'yər)
--->An attendant spirit, often taking animal form.
Its in the dictionary.
A separate being, really.
As to your question... Its a good one. But as a rather old and stead human I would fear my dæmon would be like dragging around a burst balloon
If you looked at it in really poor light with a severe squint you might think it could have been a Unicorn!