But my dog has no bell?

When cycling the tracks around the Bay there are several of these signs and you flash past them I kept thinking "they need to re-phrase that" but on taking the Blip it makes sense but it still makes me smile that I was thinking he has no bell and cannot read!

The Extra is a seat by one of the sealed cycle paths that was put in place in 2011 and the root of a tree turned into a double seat.