I know what the kosher approved symbol looks like on a meat or other food label. I'm not so sure what a halal symbol looks like.
Pennsylvania even goes a step further and and has an Amish label (the real kind). I go out of my way to buy Amish raised chicken because I know they raise and harvest chickens in a humane manner. The meat is actually darker and has a better flavor to go with the higher price.
I'm not sure how many other states use an Amish label, but I've heard that a few others with sizable Amish populations do since even non-Amish consumers like me recognize the superior quality.