Ref. the worktop - I appreciate this particular dog hasn't by the sound of it been taught anything much, but might help others - "down" should only be used if the dog hasn't and never will be taught to lie down using the same word. I use "off", which also sounds a bit gruff and barky. Meanwhile, cooking foil on the worktop creates an unpleasant feel and sound too. Dogs quickly learn that in this house, some behaviours are not allowed which might be okay in their own home.