Raisin has chewed holes in our outdoor siding and walls in our house. We use the Kong filled with peanut butter as well as once a day he gets a soup bone from the butcher shop (but I always watch while he chews on them). He loves them and will chew for hours. Some people worry about should he crack a tooth but at this point I have decided I will have to address that if it occurs. My siding, my walls, and my floor boards were tired of being his objects of “affection”. Once he cleans out the Kong he is bored and the worst part he seems to be bored if he has a toy he can not destroy. Almost like he isn’t getting the satisfaction of destroying something so he just finds something else.
Good luck. = )