I can't work out whether something is missing from his diet or whether he's just being a pain, but Whisky has started pulling pieces of wallpaper off the wall. As you can imagine, I'm suffering a bit of a sense of humour failure - it's one step forward, three steps back as far as decorating the house is concerned.
So I thought I would ask the experts (yes, you lot). Whisky's now about (he's a a rescue dog so no-one was completely sure) 18 months old so not really a puppy any more and should be beyond the chewing stage. He has chew toys and loves crunching bones and walnuts. So what is it about the wallpaper? He's made about 3 patches in various parts of the house so it can't be something irresistible about one wall. Unfortunately I rarely catch him at it so can't growl at him and tell him 'no'.
Does anyone have any ideas why, or know of a stinky deterrent of some sort? What should I do?