Yes, of course another possibility exists.

I don't necessarily think that we are different from animals when it comes to surviving death. I think it's possible that the consciousness of animals survives death too...as a living spirit that goes on and probably incarnates presently in another animal form, one that reflects its degree of consciousness. This may be true of plants as well.

I know of no reason to insist that only people have an afterlife, and that other creatures do not.

I know of no reason to insist that people and animals do NOT have an afterlife either...other than blind prejudice based on nothing at all except a sweeping assumption that one already knows. And no one here does.

So none of us are in a position to confirm it or deny it, except in our own individual case: when we die. Assuming we survive as a consciousness after that, then we will have all the confirmation we need, but only for ourselves, not for any of the sceptical minds around here amongst the living. ;-) That's because there's probably no use in a spirit talking to the "living", as they neither hear nor listen to anything except the usual noises...primarily their own voices. Or the TV. Or the radio.