The bluebird gun is for bluebird weather. The Californians and Texans haven't spent enough quality time in the field at -10. With their .410s. Seeking hunted birds.
Standard equipment in the truck in my guiding days was a spare shotgun in the same 12 gauge I brought along. It was "just in case" someone's gun broke, but, I don't ever recall it being used for exactly that purpose. It did get used to do stand-in for .410s and 28 gauge guns, that weren't up to the sideways snow, sub-zero cold, or real life wild bird habitat.
Make sure the guided remove all traces of 28 gauge ammunition in this case. They can be an excitable lot, when they start connecting on wild birds.
Best,
Ted