When Adam and Eve fell by acting on Satan’s suggestion to rebel against Elohim, the animals were just innocent bystanders, so the fact that they had no say at all in the fall of the creation could make them candidates for heaven, particularly our beloved pets who have passed on. Of course the reason for one to become born again is not to be able to just see your pets gone past, while though separated from Elohim in punishment would certainly be no place you’d want your deceased pet to be!