Sort:  

They used to.. until they started drinking the water

Since I didn't specify Michigan in the strip, I just checked to see if their is a US city called "Deerborn." There is not, HOWEVER...! There is a neighborhood called Deerborn within the city of Dearborn. Saved!

Poor quadrupeds. I shall write them a letter...
Dear, Deer of Deerborn, Dearborn.