BINGO!

Look familiar. . . 

These three sure remind me of these three. . . 

Simon aka Shadow:

*Old 

*Wise

*Calm

*Purebred

*Smart

Ryder aka Chance: 

*Young

*Wild

*Naughty

*Mutt

Rollie aka Sassy

*ATTITUDE 

*Fierce

*Ring-leader

*In charge of the whole house

See the resemblance?!?