I did not understand this until I got close enough to the sign to see that the sheep(a ewe) was holding a plant (a herb) i8n its mouth.
This may not seem like much at first glance but when you are traveling at 12 miles per hour you get a little extra time to think about stuff. as I kept looking at this scene I kept seeing more different geometric shapes , angles and lines that usual. There are a bunch when you look closely.
When I was a kid you would see these ads painted on barns all over the place. From what I understand it was very common to not paint a barn because of cost. Mail Pouch came along and painted the farmer's barn if they could include the ad. There are not many left.