Game description from the publisher:

Bringing you more than just new pets, cages and magic items, the Dungeon Petz: Dark Alleys has a whole new district in the town. This is the heart of the expansion. It�s kind of a back alley district in the Imp town where all the weird existences live and try to do their business. So would you like to hire an illegal worker or buy a pet on the black market? Maybe book a facility that produces food for active dogs, cats and dragons? And what about a fancy ribbon or a cool spiked collar for your pet? Taking care of your pets will never be the same.