there's simply no way to build cities in a way that accomodates bears or cougars, because they need a territory far larger than the area we could possibly provide in a city.

building for cougars or bears means building dense cities that perserve as much wild space outside the city as possible for animal habitats.

i like the idea of adapting buildings to be less hostile to animals that find themselves in the city, but anything that increases sprawl is the worst thing you could possibly do for wildlife.