senior - he's male, and turning 8.
colors will shine - he's mostly white, a bright color.
your other half - could be a reference to Monster, who is a dog and won romantic pairing with him, or to Psyche, who is a jackal, or Irma, who is frequently not with him.
louder than you speak - he is, in reality, quite soft-spoken.
foxes and dens - in a way he has "cornered" Psyche (though she's quite willing to frolic with him), jackals are similar to foxes in mythology. or it's a ref to the fact that he forced his ex-prisoner, Angora, into a cave. xD