Jensen may be Rin Tin Tin, but...
Fact: Dean Winchester would make an excellent basset hound.
They're gluttons.
They're messy about their gluttony.
They love to sleep.
They love to sleep where they're not supposed to, particularly if your bed is the most comfortable in the house.
They're noisy.
They're opinionated.
They love cars.
They sing along (badly) to music.
They look smaller than they actually are.
There's more than enough for everyone.
They're a joy to be around.