Has anybody had a pet who has suffered from this. Any info would be greatly appreciated . My Akita has been under the weather for a short time now i.e.

not so energetic
drinking massive amounts & peeing loads
just a bit miserable.

She went in for Bloods last week & my vet ruled out a few major problems such as Kidney Failure & cushing's syndrome. But was still concerned and thinks she may have Diabetes Insipidus . So my Akita is now going back next Thur for a water deprevation test to see whats what.