Undocumented 3.2 Pet Changes

UPDATE: Here are some more recently discovered undocumented changes made in Patch 3.2:

• Drop rates for the Strand Crawler seem to have increased significantly, with many players getting it on their first try after the patch.
• The Ammen Vale Lashling, Enchanted Broom, and Sinister Squashling all have new summon animations where they pop up out of the ground.
• Mini Tyrael can now fly in the air to follow players on flying mounts.
• The Panda Cub now often rears up on its hind legs and roars.

Apparently Blizzard didn't just add a lot of new pets in Patch 3.2. They also made a number of undocumented pet-related changes:

• Drop rates for the pet Crocolisks have increased significantly, possibly as high as 50%, or 1 in 2!
• Mini Tyrael has a new idle animation where he falls asleep, tosses and turns, and scratches his backside. He even does a little enrage emote upon waking.
• The Cobra Hatchling has a new summon animation where he slithers up from the ground.
• Several pets have had their size increased, including the three vendored Snakes, the Cockroach, and the Jubling.
• The Disgusting Oozeling now has a constant "disgusting aura" (rather than cycling on and off)