If you like the Dog class, I also thought up a few ideas for a Cat class, following the same pattern. I don't see the same potential for a "better cat" as for a "better dog". I can't think of an epic cat (i.e., a cat that's the paragon of catness, a "better" cat), and I can easily see a cat as a Sorcerer or Rogue rather than a super-cat. Nonetheless, I thought I'd go through the skills looking for cat skills.
BAB: As Cleric (or Animal)
Hit Dice: d8, As Cleric (or Animal)
Good Saves: Fort and Ref
Skill Points: 4/level
Skills
(From the Monster Manual's Cat entry)
Balance
Climb
Hide
Listen
Move Silently
Spot
(Others)
Animal Empathy (Human Empathy? "Ooh, kitty!")
Bluff (you never know what a cat's thinking)
Innuendo (if cats could talk...)
Intimidate (they can scare off some surprisinly big dogs)
Jump (seems natural)
Tumble (they do always land on their feet)
Bonus Feats
(From Monster Manual)
Improved Trip (not much use when you're tiny...)
Pounce
Improved Grab
Rake
(Others)
Alertness
Combat Reflexes
Dodge, Mobility, Spring Attack
Improved Initiative
Lightning Reflexes
Weapon Finesse (Bite and Claws)
BAB: As Cleric (or Animal)
Hit Dice: d8, As Cleric (or Animal)
Good Saves: Fort and Ref
Skill Points: 4/level
Skills
(From the Monster Manual's Cat entry)
Balance
Climb
Hide
Listen
Move Silently
Spot
(Others)
Animal Empathy (Human Empathy? "Ooh, kitty!")
Bluff (you never know what a cat's thinking)
Innuendo (if cats could talk...)
Intimidate (they can scare off some surprisinly big dogs)
Jump (seems natural)
Tumble (they do always land on their feet)
Bonus Feats
(From Monster Manual)
Improved Trip (not much use when you're tiny...)
Pounce
Improved Grab
Rake
(Others)
Alertness
Combat Reflexes
Dodge, Mobility, Spring Attack
Improved Initiative
Lightning Reflexes
Weapon Finesse (Bite and Claws)