Religious fundamentalism just has to ruin everything. From the BBC,
Iran’s capital city has banned the public from walking pet dogs, as part of a long-standing official campaign to discourage dog-ownership.
Tehran Police Chief Hossein Rahimi said “we have received permission from the Tehran Prosecutor’s Office, and will take measures against people walking dogs in public spaces, such as parks”.
. . .
Dogs are viewed as “unclean” by Iran’s Islamic authorities, who also regard dog-ownership as a symbol of the pro-Western policy of the ousted monarchy.
The Ministry of Culture and Islamic Guidance banned the media from publishing any advertisements for pets or pet-related products back in 2010, and there was a push in parliament five years ago to fine and even flog dog-walkers.