At the beginning of 1917, we see Blake and Schofield chatting on their way to receiving their orders, giving the audience a taste of their personalities and friendship. Right after Schofield shares with a hungry Blake his modest snack stash, they have this exchange (I bolded lines I have questions about):
Blake: (grimaces) Tastes like old shoe.
Schofield: (impassive) Cheer up, this time next week it'll be chicken dinner.
Blake: Not me. (shrugs) My leave got cancelled.
Schofield: They say why?
Blake: No idea.
Schofield: (grimly) It's easier not to go back at all.
They stop walking as some soldiers carrying supplies move past. Blake and Schofield continue on their way.
Blake: (looking back at the soldiers) Something's up! Did you hear anything?
Blake: Has to be the push right? Ten bob says we're going up.
Schofield: I'm not taking that bet.
Blake: (smirks for a split second) Why, cuz you know I'm right?
Schofield: No, cuz you haven't got ten bob.
By "chicken dinner", I'm guessing Schofield meant returning home for proper meals, but I'm not sure. How plausible is it that WWI trench soldiers got chicken for dinner?
No idea what "it's easier not to go back at all" meant. My first guess was that he thought upcoming military plans (like "the push") required more soldiers to stay. But Schofield denies hearing any news, even when Blake attempts to goad him into revealing something. I can't imagine Schofield has any reason to hide news or rumors from Blake, so if that line was not about a military plan, what was it about?