I'd persevere with the "NO", then praise him like mad or give a treat, when he stops.
It doesn't work with my baby Basset tho

:rolleyes:......he's wrecked the flowers in my rockery (not only by pulling the tops off and running around the garden with them hanging out the side of his mouth, but by plonking his great lumoxing ass down on the comfy, bushy plants), and chewed the bush in the corner :( I do as I previously said, and he stops, then goes straight back to it when he thinks I've gone.
He gives the expression of a true Basset....looks totally innocent, as if he's saying "It wasn't me, I didn't do it" lol. He's all sweetness and light...but he's not fooling me anymore. I've cottoned on to all those innocent, sad expressions :D
But hey, I'm still persevering ;) :D
How old is your Jackie?? What colours, etc....I love JR's :)