
Peet |

The feather domain grants a racial bonus to Perception, but many races already get the keen senses +2 racial bonus to Perception. Do these bonuses stack? Normally I would assume no but racial bonuses might be an exception to the stacking rules, since you don't normally get two racial bonuses to the same thing.
BTW, where are the rules about stacking mods anyway? I went to the index of the core rulebook and looked under stacking, bonus, racial, and modifier and there's no entry in the index for any of those.
Thanks,
Peet

chaoseffect |

Here's what PFSRD says on the subject:
The important aspect of bonus types is that two bonuses of the same type don't generally stack. With the exception of dodge bonuses, most circumstance bonuses, and racial bonuses, only the better bonus of a given type works. Bonuses without a type always stack, unless they are from the same source.
Racials stack; you're good to go.

ZugZug |

pg 11 & 13 starts with mention of stacking
Bonus: Bonuses are numerical values that are added to checks and statistical scores. Most bonuses have a type, and as a general rule, bonuses of the same type are not cumulative (do not “stack”)—only the greater bonus granted applies.
Stacking: Stacking refers to the act of adding together bonuses or penalties that apply to one particular check or statistic. Generally speaking, most bonuses of the same type do not stack. Instead, only the highest bonus applies. Most penalties do stack, meaning that their values are added together. Penalties and bonuses generally stack with one another, meaning that the penalties might negate or exceed part or all of the bonuses, and vice versa.
Otherwise its sprinkled throughout. The Armor section of the Equipment mention Armor bonuses don't stack, Combat section mentions Dodge bonuses (unlike most other bonuses) Do stack.

chaoseffect |

I started looking through the CRB after this topic and the only thing I really saw was the explanation given under Terms that ZugZug pointed out. I don't know where the clarification that I posted came from, but it doesn't seem like it came from the CRB. Don't know what I'd do without that site tbh.