Tubes are not sufficient. Hamsters are burrowers. They require deep (6+ inches) bedding to dig tunnels. Wire wheels cause spinal injuries; they need solid-surface wheels. If a hamster is biting its cage bars (bar chewing), that is a stereotypic behavior indicating severe environmental distress.
Animal welfare extends beyond the immediate home. It concerns how the animal arrived and how it will leave. man s sex dog petlust com free