I work as a manager of a Long John Silvers and can testify that many of our brethren (and sistern) cannot do mathematics. Does that mean they are not rational beings?
I think we fall into a trap of anthropomorphizing animals. I see here a lot of comments about what a rational being is, but fail to see where there is a connection between this and ‘going to Heaven’. Trying not to get off topic, but do Catholics not believe in the Earth becoming cleansed and renew (Rev 21:1)? And if the Earth shall be cleansed and become part of the Kingdom of Heaven (or Be the Kingdom of Heaven) does that mean the Earth has a rational soul? What about a child with severe anencephaly? Clearly, that child will never be able to perform any cognitive skills. Is that child then considered soulless?
Please don’t take these questions as interrogatory, but rather trying to understand the logic behind it. I see two great faults in this approach to what goes to Heaven.
First, a decision has been made arbitrarily apart God what goes to Heaven (for the sake of convention, is it OK to call this redemption or being redeemed?). I see in the scriptures plenty of statements about what Man must do to be redeemed, but the only statements regarding other animals are blank. We certainly read of other Animals in Heaven (the classic lamb lying down with the lion being a classic example). What scriptural statements are there that say that only man is redeemed?
Second, even assuming that one requires a being to be rational, how can we say what is rational? I am not one of those animals have rights to types, hey, I eat meat and wear leather. Looking at the example of this thread, I have owned dogs all my life. I see them constantly control their passions. They know it is taboo to eat from another hand then mine. They never eat off the table. They resist the temptation to smell other dog poop (usually). They have an ability to pretend and create forms (albeit in a very limited way). Is their intellect as powerful as a humans, surely not. They have the ability to create and enjoy fiction, implying imagination.
As I have read the responses here I have gone back and looked into some of the ancient and medieval philosophers works into immaterial forms and the soul. These forms have been discredited regarding ontology a long time ago. When I took Ancient Philosophy my professer briefly explained some of the outgrowths of Forms and its impact on the medieval Christian Church. I did not know that the Catholic Church still considered forms to be real in the sense Plato, Aristotle, and the rest seemed to believe. Frankly, I find this very surprising, if true.