I have the factory fitted cargo-net installed (and really well tensioned) just aft of the rear seats in my estate......My three Border Collies wear body-harness` clipped with suitably sized leashes to the tie down points on the load area floor.
I have a large and a medium sized crates (Vari-kennel) which I use at certain times (e.g: when the bitch is in season) which fit reasonably well to the load area/tailgate shape, but I feel the crates are confining and get uncomfortably hot and airless on long journeys so settle mostly for the harness/leash solution.
I did once see a tailgate inner-gate (made of plated steel) advertised on eBay; it was suggested that it was an original Vx. item and seemed to fit the sellers car very well; well shaped/secured and only being an inch or so inside the tailgate/rear-window and meant the tailgate could be left raised (when parked) on hot days and still keep the dogs secure....sadly, it went for 'too much' for my purse.

There are advertised custom tailgate cage/guard manufacturers in several of the monthly 'dog' publications: but being bespoke, they are quite and investment.

As many here on OOF know: I adore my dogs and worry greatly about their safety when transporting them in my vehicle: especially having seen how easily tailgates fly-open and windows shatter during accidents.....I always drive accordingly with that in mind when the doggies are on-board.
