The trailer for this film includes a specially shot scene of 'Margaret O'Brien' visiting with Spencer Tracy. Tracy tells the child star he never wants to make a movie with her because she's too good for him!
The title is taken from The Holy Bible, The Song of Solomon, Chapter 2-15: "Take us the foxes, the little foxes, that spoil the vines: for our vines have tender grapes."
"Lux Radio Theater" broadcast a 60 minute radio adaptation of the movie on September 2, 1946 with Margaret O'Brien, James Craig and Frances Gifford reprising their film roles.
The cars/trucks have no windshields. Studio lights can be seen reflected off vehicle bodies but not where the glass would be. Additionally, this movie was filmed/set during World War II when gas was rationed; since there's no windshields, there are also no rationing stickers visible.