KruXoR

No more taming Polar Bear Cubs.

It would have been a classic pet! :)

"Polar Bear Cub -- This wasn't intended to be a tamable pet, and it looked ridiculous."

Source

Also on the Pet leveling front:
Pet leveling changes
We just recently increased the pet level rate. Pets needed 1/16th of hunter experience to gain a level, but don't benefit from quests or rest. Those two account for a lot of experience, especially at higher levels (where quest content tends to be denser).

We changed the experience needed for 1/10th. You should notice a big jump in pet level rates. I am not sure if that change got in the most recent data push. (Source)