hessian sacking will kill rabbits if they chew on it, boxes are best.
Elaborate? Hessian material is woven jute fibres. Jute being made a non toxic, non poisonous set of plant fibres in some cases or the jute plant itself which is also not harmful, I would of said they could chew it fine... As far as I am aware, they continue to make them without treating them with anything so they are biodegradable...I cannot elaborate , I was told by more than one person back in the 1950s that you should never put live rabbits in a sack as chewing the sacking was poisonous .everything was carried in hessia