McCasper's page

I think small cats are being overlooked here. By level 9 they could have a dex of 30(+10) if you keep them small sized and have animal focus or a dexterity belt at +4. Then with natural armor(+7), small size (+1), and mage armor (+4) you could have a standing AC of 32. Throw in some more buff spells (Shield, Bark Skin, Shield of Faith, etc) and feats (Dodge, Improved Natural Armor, etc) and you could easily have an AC in the 40s.

Not to mention it also has trip on its bite. Even at small size a Dex of 30 and agile maneuvers could end up putting a lot of enemies on their butts.

This could all happen even earlier depending on where you put your ability score increase.

I Think your attack bonus should be higher. You should be getting +3 from BAB, +1 from Strength and +1 from size for a total of +5. If I were you, I'd also get Weapon Finesse for a total of +8 to attack. +3 by level 5 is abysmal.
You might be prepping for level 7 when its strength and dex even out and it seems Weapon Finesse is wasted, but then you can just retrain or get a new raptor.
Also, I recommend getting the attack trick twice so you can order it to attack zombies and such.