The heavy duty 18G galvanised mesh used in the Rabbitat is approximately 70% stronger than mesh typically provided with many aviaries and runs, preventing rabbits from chewing their way out and predators from getting in. We pressure treat our high density Spruce with non toxic Tanalith ‘E’, forcing the treatment deep into the timber, so your rabbits won’t get sick should they decide to chew on it. Please add an insulated shelter within, or permanently attached to, the Rabbitat.