I have been using Grannick's bitter apple and Newf absolutely can't stand it. When he even see's the bottle he growls and barks at it . He totally freaks out!!! The lady at the pet store told me that when i catch him chewing on something to just give a little squirt in his mouth and then spray it on the furniture or whatever he was chewing on. I hated to do it like that but all it took was the one time and now as soon as he smells it on something he freaks out!!!
