It is estimated that about 70,000 dogs live in Barcelona. They're not all registered, even though the law requires every dog owner to do this, but it doesn't always happen.
Barcelona may well be classed as a 'dog friendly' city, but it can be rather difficult for dog owners to visit some places with their pets. The good news is that more and more establishments are now allowing people to bring their dogs too.
There are even some "militantes" places that not only allow pets, but they consider their presence to be completely normal. This is the case of the art gallery "Cosmo" in Enric Granados Street. The owner of the art gallery came up with this idea of creating a gallery-café that's open for breakfast and displays temporary exhibitions for visitors with pets.