Is it normal to eat food in the store?
I've always done this and it has never gotten me in trouble. When I am shopping I will eat as I shop. When I'm done I will either put the wrapper/bottle/box... onto a shelf or sometimes I will even bring it to the counter and pay for it. Whenever I have been caught I just tell them I'm going to pay for it when I leave which I do if they catch me. I never do it with something I can't afford in case I am being watched. Doing this has saved me a lot of money and also allows me to try before I buy.