When the cook sounds the alert that the meal is ready, it is very obvious that the background showing cactus, rocks and hills is a picture. The rest of the scene continues to show that it was filmed on a soundstage.
When the cattle drive is seen, the cattle are on a filmed backdrop. The closeups of men riding along with the cattle show that the men are on prop horses, just rocking back and forth.
When the stampede is started by the bad guys shooting their guns, Langley rings the dinner bell to wake his men up, as if it would wake them more easily than gunfire.