There's a lot of information about the porgs, which are bird-like creatures native to Ahch-To. Here's a fairly detailed summary much of which is learned from marketing and merchandising material.
As we can see in the trailer,
at least one porg goes for a ride on the Millennium Falcon with Chewbacca.
Are the porgs all nameless animals or do they rise to the level of, for example pets or companions, garnering names or nicknames, etc?