SRS, we used to have a garage area for dog use but took it down when we started parking in there. Ours was made of ag panel sections, attached to screw eyes, about 5' square. I miss it. Maybe someday there will be room for a dog door entry, but that awaits replacing that door (it's rotting and patched to last 2 more years).

To ventilated the garage in light of neighborhood security and weather patterns, two solutions look feasible-- adding either a louvered vent above the garage door (bye bye basketball hoop), or an awning over the window by the appliances. The awning is preferable but pricey. We'll probably discuss a home-made, rigid wooden one made like an indoor valence box. After I sit and contemplate that window's existing curb appeal.

We're also exploring a worm bin for composting to reduce plastic trash bag use.