Transcript
Panel 1: [Sarah wearing white robes with small angel wings and a halo bends down to receive a spotted dog with little angel wings that runs at here. They stand on clouds]
Off screen: Welcome to Heaven! Here is your dog!
Panel 2: [Sarah pets the happy dog absently while looking up at the off screen speaker]
Sarah: Where’s my cat?
Panel 3: [Sarah stands, one hand still petting the dog as she looks around at all the different dogs in heaven.]
Sarah: Where’s ANY of the cats?
Panel 4: [Cats stand on their hind legs, holding paws, dance in a circle surrounded by the flames of hell]


AFAIK, there’s not direct mention of what happens to animals when they die, but many modern interpretations say that if Heaven is a paradise for humans, and if animal companionship makes humans happy, then there will be animals in Heaven.
Then again there are sects that believe that basically everyone in Heaven is brainwashed to be happy all the time just to be in God’s presence, and that the only activity there is round-the-clock praise and singing, so animals don’t really have a place there. Which is two kinds of shitty: what kind of “paradise” is no pets AND endless church?
Legit some Christians think Heaven will be Heaven because they will be enjoying watching the eternal torment of the sinners below.