100% is a big achievement in street dog unavailability - much harder than, say, 99.999%. In k-nines (un)availability, the cost usually increases by 10 * k to increment k by 1. It's tempting to imagine that they didn't actually get to 100%, and there are some hidden holdouts who have escaped the program and will re-establish the street dog population covertly.
Intentional pun? :)