We have a senior dog and a puppy, naturally the puppy annoys our senior and so we separate them in the car. We used to do this by putting the puppy in a crate but this didn't leave a lot of room for our other dog.
We were umming and arghing for ages about ordering due to the cost but I'm so glad we did! The quality is second to none, it's as if the car boot was made bespoke to our needs now and my pups love having their own spaces!
Have already recommended to all my dog parents!