
Sekret_One |

The gods forbid the summoning of badgers, for they are blasphemous beasts.
Yeah... Though you could probably swing summoning something else as long as its an animal/elemental/vermin of the same CR. Kinda disheartening that you can't summon up interesting animals from the advanced beastiary- though most of those monsters fall under the 'crazy go nuts' category.

Frankthedm |

Bestiary 1 animals seems like they were carefully rebalanced, some might even say 'nerfed', to fit their rolls as foes, Summons and Compainions. The same might not have been done for animals in later monster books.
EDIT:
Originally Posted by James Jacobs
We really just don't want to bloat the summon monster tables with too many choices, honestly. It's already kinda hard to choose a monster; making there be TOO many choices spread across TOO many books just leads to option paralysis in game and that's not good.Adding new monsters to the summon monster lists is a great house rule. And we add a few here and there in the deity articles we print every four volumes in Pathifnder. But beyond that... we are unlikely to officially expand the summon spells with new Bestairies. Just not a direction we're interested in going.