Dean’s familiar, Cas, has the form of a big ass raven that likes to perch on his shoulder and croak out a few words now and then but mostly just watches everyone thoughtfully. Dean feeds him bits of his burgers when they go out to eat.
Sam has two familiars. Gabriel is the peacock who has a terrible habit of try to perch on Sam’s head and then always manages to get tangled up in Sam’s hair. Also has a fondness for candy bars which he will steal from anyone within pecking distance. Sam’s other familiar is a large, overprotective golden eagle named Lucifer. Most of the times he’s very lazy and just kinda lolls around the house until someone comes over to visit in which he follows Sam closely around and sometimes gets into spats with Gabriel.
Adam has a very aloof barn owl named Michael. Most of the time Michael is off doing his own thing and only comes back to Adam for food and sleep. However, he does have a protective streak but it comes out very rarely. Adam and Sam had to start leaving their familiars at home whenever they met up because of the fights that Lucifer and Michael would get into.
Bobby has a very bitchy, bearded vulture named Crowley who is fond of Scotch and just about nothing else. They constantly argue with each other and its not uncommon for Crowley to disappear for a few days. Normally he’ll come back with a few unbonded familiars in the forms of crows.
Azazel has two familiars as well, Ruby and Meg. Charlie has a familiar named Dorothy. Cain has Abaddon.