[maxglute]

I don't feel like they need to be effective. Lots of pedestrian pet lovers will stop to check out poster on their own volition, especially people from the neighbourhood. They have internal interest to look for random pets, and being walking speed, have much better chance and probably already acquainted neighboorhood regulars vs strange outdoor pets.

Now what does actually seem ineffective is color posters with different shot of same animal, and their fur looks different colour in every shot, because that's how fur behaves, but to human mind it's a bunch of different cats.

What seems supremely ineffective are lost bird posters.

I've seen the same lost cuckadoo posters in different neighbour hoods in my city... over multiple years. SOmeone was very attached.