I assume you are using a PS3 to play your discs on.
I can't help with the Chicken Little question as I have the US "ABC" (region free) version which does have the commentary on. When putting the disc in the PS3 it does say it is "checking" before any menu options come up, so perhaps if you are on a stand alone player, options which are not supported are not listed?
However, the Disney UK Pirates of the Caribbean discs do miss the commentary tracks off, so perhaps the same is true of Chicken Little. It's lame if it does, what with Blu-ray studios constantly boasting about their 50Gb storage limit.
As for the Wild, this does not and has never had a commentary track on either the UK or US release (I have the UK The Wild on Blu-ray). However it does have commentary for the deleted scenes.
Update the features for The Wild listed on the website are actually for
The Rock 
Typical Buena Vista Home Entertainment UK shoddyness once again.
AND I CAN'T BELIEVE THAT SITE IS STILL ADVERTISING THE COMMENTARIES FOR THE PIRATES MOVIES!
See what the Advertising Standards Authority have to say about that!
Update Again And it claims Cars is "available NOW" on Blu-ray.
Just forget about that site. its full of lies.