They will need a variety of toys and chew bones to help reduce the chance of boredom that could result in material damages. (thehappypuppysite.com)
The cost of bird control at airports worldwide is estimated in the billions, and does not consist only of material damage, as birds can also be the cause of fatal accidents. (sciencedaily.com)
If money dries up, they will quit, and do something else without material damage to their psyche. (sramanamitra.com)