War Horse reminded me of a book I read when I was younger about 2 collies who live on a farm, 1 goes to war with his master. They return suffering the after-effects of a gas attack. The family's aple orchard is threatened by an early Frost and the younger son saves it by burning piles of compost around the orchard.. Anyone read it?
Albert Payson Terhune wrote a lot of collie books, including a couple about WWII. I don't remember that one offhand (I know there was one about a dog who went by himself, and came back, but I can't even remember which one it was any more.) My mom has a lot of them, and I'll try to look later.