Early in the film, Arvella calls California by her "Lucy" name, before she actually decided to adopt that name.
Immediately after her daughter sets the pheasants down, her mother claims there's "no buckshot." There is no way you can immediately identify this without closer examination.
Early in the film, empty tin cans were shown littering the creekside, indicative of how the gold-rush miners littered the gold fields. But the cans depicted were modern tin cans, not the type of cans used in the mid-1800s when this story took place. Among other differences, the cans of that period would still have had their lids soldered on by hand, which means they couldn't be opened neatly like modern cans, making for a rough or jagged appearance to the lid when opened. The cans depicted were modern ones, with neatly opened lids as if done by a modern can opener.