Hi all. I have 2 3yo chis who will not stop licking my couches! I just got new couches and they are a different type of fabric than our previous ones, and my chis have started to lick them! I say no and try to stop them but they are right back at it in seconds! any ideas how to get them to stop? I would like to allow them up there, but the licking has already led to discoloration. Please help!