Supa Nesting Bedding Material. Supa Nesting Bedding Material is made from recycled hessian (jute) sacks so is natural product. The nesting or bedding material can be used to provide a warm welcoming sleeping place for your pet. Suitable for cage aviary birds such as canaries finches and small animals including hamsters, gerbils, rats, mice, guinea pigs, etc. In addition, try leaving some out for the wild birds in your garden to make a nest from in springtime.