I tried hot peppers when the bitter apple failed. They don't all like the bitter apple, just be prepared if it doesn't work. Of course the peppers didn't work with Doodle and he just had to be constantly watched. I wouldn't leave him alone to give him the option to destroy things. I learned quickly that even stepping outside for a second gave him the opportunity to chew on something. He loved to chew on wood and sat down chewing on the stair banister when I stepped outside to get the mail. Very sneaky devil. Or he would act like he was chewing on a toy and really be chewing on the wood of the recliner. He couldn't play around the recliner anymore. Oh! I was happy to be rid of the teething stage. As with the kitchen, I wouldn't leave him unattended. I personally crate mine, especially for reasons like Doodle.