Not sure about using a vacuum on my horses. I don't know how they would take that, lol. I have a friend who uses a furminator on hers and loves it. I usually just use a shedding blade, curry combs, and some elbow grease- you know- the old school method . I might have to try the vacuum though. Just one more "scary thing" I can introduce them too. I am always trying to come up with new stuff to desensitize with . If I can get some hair off without being covered in it, that's a total bonus!