I'd like to present my view on gratitude among gods and their nature (Were/are the god(s) animal(s)?). I'll attach two quotes from Letter to Menoeceus and elaborate on them. All criticism is welcome as I spent a lot of time trying to figure out how to understand the nature of gods from a perspective of Epicurean philosophy and I'm still not sure if I got it right.
(1) On gratitude:
[...]And the impious man is not he who popularly denies the gods of the many, but he who attaches to the gods the beliefs of the many.[...]
We cannot treat gods as reflections of humans, therefore gratitude, as any other human feelings, must be alien to gods.
(2) Were/are the god(s) animal(s)?:
[...]For gods there are, since the knowledge of them is by clear vision.[...]
Immortality of individual gods is not permitted by Epicurean physics (as there are only 3 things that are eternal and indestructible: individual atoms (not compounds of them); the void and the universe itself as an infinite container of infinite number of everlasting atoms)). Epicurean gods have no names. There are no individual gods mentioned anywhere and for good reason. There are infinite visions of gods, however, that we can perceive because in eternal universe there must be infinite number of gods and our minds are capable of detecting some of the visions.
Epicurean gods can be viewed as immortal only when seen as collective of infinite number of blessed beings. On individual level they must be creatures that reached the state of blessedness but they are alive, created from compounds of atoms and therefore mortal and destructible.
So, were/are the god(s) animal(s)? The answer is yes if gods are considered as separate beings (blessed but created from compounds of atoms and therefore mortal and destructible living beings). The answer is no if we treat Epicurean gods as everlasting visions and ideals of blessedness to which human should aspire.