“Scenting” is the process of taking a frozen-thawed or live prey item and rubbing it against another scent so the new smell overpowers the existing scent - hopefully making the prey item more appealing to the Western Hognose.
All too often we see people jumping right to scenting as soon as their Western Hognose goes off food. Scenting is almost never a "fix" for whatever caused your pet to go off food in the first place.
It is a perfectly healthy behaviour for a snake to choose to miss one or a couple of meals. So long as the animal is not looking dehydrated, sick or is losing weight, there is nothing to worry about. Many steps should be taken first before resorting to scenting as it can lead to what we called "Spoiled child syndrome" which is when the animal will eat only the new scented item, which may be difficult to get a hold of, and is likely not nutritionally balanced. It takes a good breeder a long time to establish babies onto frozen-thawed, non-scented meals and scenting can undo a lot of that work and can be difficult to get the animal back on track.
Remember to allow for a week's time of not offering food or bothering the animal. in between each change.