It was a “ram-dom” act of vandalism.
This bighorn sheep must have had a grudge against the store owner. In the video below you can see a group of bighorn sheep gathered in front of a store window. One of the large males looks directly at the storefront glass and most likely saw his reflection. That caused him to ram through the glass. Afterwards they scatter like a group of guilty teenagers.
Colorado bighorn sheep are populations are managed by hunters. Maybe they need to issue an extra tag or two in this area.