Dog In A Purple Hoodie

We sat in the Sweet Life Patisserie, drinking excellent Americano coffees and sharing a delicious cinnamon scone while thinking about Kathy's healing of her left foot. 
I noticed out the window, across the street, a dog in a purple hoodie coming towards us. 
The dog and its human passed by us just outside the window. 
That's when I saw the clear plastic bag on each of his feet.
He showed no sign of being bothered by the four bags covering his feet as he walked by nonchalantly in his hoodie, showing "Don't Pet Me" on his harness. 
The rest of the day, I've been cogitating possible reasons for this canine footwear and why I can't pet him... I really liked the purple hoodie.