Hello, I have an 8 month old Aussie who I take everywhere with me. Unfortunately I have a sedan so his crate doesn't fit. I tried what I thought was the best next thing: Solvit dog harness. It used to work great until my Aussie figured out just where to bite it to disconnect. I bought one more of these harnesses and sprayed it with bitter apple. On the way to the dog beach I had him in his harness and thinking he was restrained lowered the windows a little (my fault I should have known better) so he could get the ocean breeze. That's when I saw his two little dog feet go out the window in the rear view mirror. I immediately stopped, luckily the other cars on this busy hwy did too. He ran straight for me, luckily only a few scratches but that's when I noticed he managed to chew through this harness too! I'm not sure if he fell or jumped but from the scratches on his face he definitely landed face first. So now I kept windows shut but still don't know how to restrain him. Thank you!