Only humans are spiritual beings created in God’s image so it would seem ludicrous for farm animals, insects etc. to share in a heavenly reward. However, the love we extend to pets would seem to place them in a different position.
what about animals like elephants? or dolphins? or whales? or chimps?
these are all clearly intelligent animals. they feel emotions that we can identify with. look at the behavior of elephants when they come across the bones of a long lost friend... or dolphins that have attacked sharks to save shipwrecked sailors lost at sea... or chimps recognizing themselves in a mirror... i think there is more to God’s relationship with animals than we realize. it would seem very cruel for God to create such creatures, allow them to lives their lives on this planet (sometimes in misery - such as captive circus elephants in 3rd world countries) and then abandon them at their moment of death.
i’m not anthropomorphizing them... just noting that there is a big difference between a cockroach and an elephant and it would seem an unjust thing for a just God to not allow for some sort of eternal existence for their consciousnesses.