It is possible for the cat to move around get strangled by the tether, and choke. I would NOT recommend to use the interior tether. Keep in mind that these reviews were provided by different people, and they may have different opinions or use the backpacks for different types of activities.īefore we get started I want to note that most of these backpacks come with an interior tether. Thank you to everyone who provided their review! So I have asked some of Teddy’s friends to give their reviews on these backpacks. The backpack is the second most important piece of cat exploring gear, right after the harness! There are so many options out there, and I personally have not had the opportunity to try them all.