Alexander actually has the advantage here as long as he dos not stand still:
it hits on a 14+, Alex hits on a 12+, and if Alex uses his spell again it will have to roll a 14 or higher to avoid taking d6.
two levels and Alex gets +1 AC to boot XD
Also, as long as you always take a 5' step away from them, they can't  make claw attacks. might stink trying to hit them with Alden's melee  attack, but you will need survivability more then any thing, if you're  only taking bit attacks it will need to hit and make a full d6, that is  about a 06.6% chance of getting one hitted: and this only knocks you out  of the combat, with the claws being used this gos up to a 26.6% chance  of geting one rounded: note this is excluding charge attacks. Also, the  redshirt Gnoll's are stronger in the charge(1d8+3 Vs 1d6, and they hit  more easily, that's right, they can do one hits and you have a party of  them with you! 

)
and Wetnose should have a class level or two making him a damned sight more powerful then anyone of the krenshars.
The big threat will be their fear ability, they have low will saves  (+0...) so allot of them could flee in the first round. Best hop they do  well in their charges and force the cats into a retreat quick fast and  in a hurry. ^^;
(that said Poobreath is fleeing towards you, he has a long spear and if  he stops fleeing and joins the fight he will basically make a anti charge  wall around himself, stand behind him and to the side and you will be  safe if this happens, other wise just skirt the other Gnolls and make sure you can't be attack by any thing that dos not tak at least one AoO: the cats  CANNOT afford to take AoOs from the Gnolls; if the Gnolls get any free  attacks this becomes massively lop sided. One attack from any of the Gnolls is better then both claw attacks from the cats in both damage and accuracy 
