Hahaha
Lining the back doesnât seem like it would help because theyâd chew through the front before they discovered the metal. It would keep them from getting in the oven but youâd be making replacements a lot.
They say the same thing about mine. Itâs only supposed to be used when burning wood. I expect thatâs due to the risk of damage if itâs used with the sliding vents closed & the propane burner firing - the oven could heat up so high it could crack the stone or possibly the exterior ceramic.
Iâm a responsible grown-up so I ignore the prohibition. I always have the vents open and even place the door so itâs ajar. I donât let the oven go above 950F. It makes a big difference in warmup times when itâs cold or windy.
I donât know how much the opening changed between the dual-fuel model I have and yours so I donât know it would fit but if it didnât I would think you could easily make one just for when youâre not using the oven by using some 10-12ga steel plate cut with a grinder and then painted to prevent rust. A hardwood dowel screwed into steel standoffs (or even a couple of bolts with nuts creating a space between the handle & plate) would be a half-hour job.
I can trace mine and send you a scan so you could cut it out in cardboard to see if it would fit if youâd like.
I donât know anything about rats nibbling copper, but copper flashing in the back and something similar to this in the front Copper House Numbers could work for v2.0.
Taking a different approach, you can try using peppermint and cinnamon essential oils around the pizza oven (either DIY recipes or maybe something like Grandpa Gusâs rodent repellent that you can buy in various forms).
Maybe you can use the wood one you made and spray it down really well with peppermint and/or cinnamon oil.