I am also supersorry!
I had already virtually adopted all the dogs advertised on line!
In the future, I will for sure look for a dog friendly apartment.
For the moment, I will do my training and offer my service (for free) to dog owner who maybe are lucky to have to possibility to have a dog but don't have time or energies to walk or run them
I have already tried to look for a shelter where I could walk their dogs (or help cleaning) but couldn't find any.
In case you know of any, in zurich or nearby (don't mind taking the train) please let me know!