Milo has been through our backyard drip irrigation system, door stops, door jambs, a cellphone case, a HEARING AID (he's running up quite a tab), dog beds, towels, sheets, comforter, blankets, pillows, drink coasters, shoes (I am in the high spenders club on an internet shoe store-free overnight shipping!), firewood, $40 support socks, pill holders, DVD (Netflix doesn't have a "the dog ate it" problem catagory), a Brillo pad, all of our area rugs, firewood, drink coasters, twist ties, ballpoint pens, camera cable, matches, to name just a few. He has taken a few nips at furniture and we constructed a guard that goes around the bottom of the sofa to keep him from chewing on that part.
We put things up but all it takes is a moment of distraction from his supervision. I have tried topical products with limited, momentary results.
He has a nice toy box and likes toys too. We let him chew the toys.
When we took him to the ER for a stick stuck in the back of his mouth the vet said this breed may take 18 months to stop chewing. But I'm worried because a dog care facility tells about a doxie that showed up with his bed all repaired with duct tape and he immediately started tearing it apart. Problem is, they describe this dog as "older".
The good news: at almost 18 months Milo is getting better. I no longer have to jump out of the shower to protect the bath mat. His chewing has a daily rhythm that we can anticipate. He will sleep on his bed during the day and savage it right after dinner.
Constant vigilance, patience, baby gates. That's all I can suggest.