That glitch is a very old glitch used in nacht der untoten (original zombies). Lately if you were inside one of your teammates, the game would end and you would be forced into the lobby. They may have fixed that because that hasnt happend in a while but it doesn't work full. You can't always shoot and eventually the zombies usually get you. Never tried on dogs before. So I would say no, even if it lets you the chances are you will die. The barrier could be on it is not a variable. And can work anywhere in the map just have to get inside eachother.

sewer waste is right, this glitch works for a few zombies and then they kill you.