Trust me THEY WORK. Only thing I'd have to say is that when using them I think firmer feathers work better on the feet, and more softer ones would probably be better for like the ears. I say this because I think the stiffer ones (kind of like the ones that were used as pens centuries ago) can be a bit abrasive to the inner ear, but if you just want them for tickling feet, then those are definitely the best choice. Good Luck
In some cases yes, but for the most part, feathers suck.
I would trust her opinion.......she definitely knows from experience