[ldenise]

I use the pennies in a pop can. (rinse it first, LOL). I pick it up by the top, so as to cover the top of the can (dont want the pennies to go flying), give it a really hard shake (once), saying NO at the same time. this technique has not completely stopped them from barking but it certainly has slowed them down. Mine don't bark at night unless they hear something. Until I see just what they are barking at,... I dont' want them to stop barking. so our problem is a little different than your whining problem.
I have issues with the spray bottle. I tried that method with Ahia and now every time she sees a spray bottle (like her leave in conditioner) she runs from me. so.... in my opinion, I wish I had never tried that one.