Before you fellows end up in the dog house and no beaver of any kind !
why not go to the store and buy lettuce or something ? Iceberg comes to mind it is sort of whitish and fairly solid , Or how about a thin piece of plastic or insulation . I know for a fact that beaver go for insulation when there is no poplar around . I have caught many on this crap.And I,m still sleeping in my house although in another room ! LOL