It all depends on how stubborn the dog it. The dog we had before Gracie, Freckles, a St Bernard, could fish a pill out of almost anything. It didn't matter what it was wrapped in, you gave her the pill and 5 minutes later you heard the click click click of the pill rolling across the floor. That's what led to Gracie being given her pills the way she was.

If PB works, keep using it!