I use this one right now for my two cattle dogs and like it a lot. It's really easy to install and remove when I need to put the seats down to move larger things (just slide out the head rests): https://www.amazon.com/AmazonBasics-Adjustable-Dog-Car-Barrier/dp/B07SZNQ3FR/ref=sr_1_19_sspa?dchild=1&keywords=dog+car+barrier&qid=1632436729&sr=8-19-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyU042WDVMWkE3WDJVJmVuY3J5cHRlZElkPUEwNzk1NzIzRDJGRFZNTFNYTVE2JmVuY3J5cHRlZEFkSWQ9QTAwODc2OTQxSU85RzREMjFMU1kmd2lkZ2V0TmFtZT1zcF9tdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

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I've also use this one in the past and liked it. I prefer the visibility of the one above though: https://www.amazon.com/Walky-Adjustable-Automotive-Headrest-Application/dp/B0039U7NOO/ref=sxin\_15\_ac\_d\_pm?ac\_md=4-3-QWJvdmUgJDUw-ac\_d\_pm\_pm\_pm&cv\_ct\_cx=dog+car+barrier&dchild=1&keywords=dog+car+barrier&pd\_rd\_i=B0039U7NOO&pd\_rd\_r=80a106a1-ca14-4977-ae93-33d567460f7f&pd\_rd\_w=acKhS&pd\_rd\_wg=uzN3f&pf\_rd\_p=59cd35b3-fd01-41c8-b226-e181f5db7b0f&pf\_rd\_r=KNDX08AAWJCR8QRYAD1Z&psc=1&qid=1632436729&sr=1-4-22d05c05-1231-4126-b7c4-3e7a9c0027d0