Occams razor tells me that other animals probably do have a concious experience just like ours.
Sure, they could have all the same internal organs as us (at least with mammals, and reptiles/birds to a slightly lesser extent), a similarly structured brain, be evolved from the same common ancestors and exhibit all the same outward signs of being conscious and self aware but somehow be totally different from humans.
But that would be much more complicated than the simple explanation that they are just like us, but less intelligent.
Sure, they could have all the same internal organs as us (at least with mammals, and reptiles/birds to a slightly lesser extent), a similarly structured brain, be evolved from the same common ancestors and exhibit all the same outward signs of being conscious and self aware but somehow be totally different from humans.
But that would be much more complicated than the simple explanation that they are just like us, but less intelligent.