I have a friend who works for a local machine shop and they offered to build me a free custom crate from my shepherd who is in SAR training. They provided me with a drawing of the crate, but I was wondering if it would be big enough? The crate was designed so I did not have to put down my back seat. The crate is 28" deep, 38" wide, 28" tall, with the top being tapered to 20" deep so it will clear my hatch on my suv. My dog is 8 months old, 75 lbs. and is 26" tall to her back. Do you think she would outgrow it or should I change the design?