Officers in the Indian Wars period generally wore whatever they wanted to in the field, including left-over CW gear/clothing/etc. Since they also bought their own, they probably would have ordered a better quality shoe/boot. However, if the infantry officer had been enlisted during the CW, and then received a field promotion, or possibly attended West Point, he might have kept the enlisted shoes (brogans), and worn then less, so they wouldn't have worn out so quickly. (Most CW enlisted footwear was made of a cheap material that became a name for low-quality goods...i.e., "shoddy".)