I did my best to search around the wiki and forum, but i can't dig up info on pets special attacks.

Would it be possible to explain me the following?

Roar Attack
Poison Attack
Fire Breath Attack.

Now, i do have a good idea about Poison and Fire Breath, but i'm looking for info on Roar attack.
Also, is it worth spending points on Poison and fire? If a pet has magery, won't it use it already?
Do not waste points on those skills unless the pet already has the ability
thx