I've just bought a 2013 Audi A4 Avant which I would like to keep tidy after changing from a Honda CRV that had more dog hair than the dogs and bits chewed when the dogs got bored. I've got a border collie and a minature jack russell. Does anyone have any recommendations for a low priced dog crate that will fit in the back of the A4 while given them enough space to be comfortable?