Blave |
I seem to remember James saying that all clerics in Golarion must worship a deity and choose among that deity's domains. The "worship an ideal" part of their class description in the core rulebook is for use with other settings.
There are no deitys with animal / terrain domains on their list (none that I know of, anyway). So assuming those domains aren't druid exclusive, your only way to get one of those would be the seperatist archetype (or playing a campaign outside of the "official" Golarion).
That being said, I don't think any of those domains are more powerful than the usual cleric domains so from a balance standpoint I don't see any reason to deny the cleric access to them.