i am starting to doubt dogs, unless R* wants to create about a dozen different breeds... they made sense in RDR because dog breeding wasn't huge back then in america... nowadays there's a thousand different breeds... there might be german shepard K9 units, but i don't think there will be domestic animals... fish yes, sharks and whales, no...
rats, pigeons, seagulls, hawks, snakes all sound plausible, but i don't think they are going to create all of these exotic animals mentioned... larger scaled animals have no place in an urban setting... you don't want to have to hit a coyote or dog every couple of blocks, you could pop some tires or get in a serious car crash... if there's a desert setting, perhaps you would see a few other animals like a lizard or scorpion... however, i still think larger animals are out of the question... dogs could be sprinkled in here and there, but not on the scale that you all are thinking of...
this is an urban driving simulator, not the wild west...