I was told that exposing their tummy to you can give them a feeling of submissiveness, so it sounds like little Neena just doesn't want to be "controled" -- But then again, it may just be uncomfortable for her?
Sandy is probably THE most submissive dog I've ever known. She rolls on her back when I get home or come in from being outside, it's like she wants me to know that's she's ready for a rub! So cute