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.