I don't agree with the dog=yes, that would mean that you can put the dog into the waste basket. :-) :-) BTW, for the plastic bags issuing, it would be better to tag it as amenity=vending_machine, vending=excrement_bags, fee=no, see e.g. "Hundekot-Tüten-Spender" on the german page https://wiki.openstreetmap.org/wiki/DE:How_to_map_a#H

I don't agree with the dog=yes, that would mean that you can put the dog into the waste basket. :-) BTW, for the plastic bags issuing, it would be better to tag it as amenity=vending_machine, vending=excrement_bags, fee=no, see e.g. the german page https://wiki.openstreetmap.org/wiki/DE:How_to_map_a#H