
Gauss |

Poison:
The saving throw to resist a poison is usually a Fort save (DC 10 + 1/2 poisoning creature’s racial HD + creature’s Con modifier; the exact DC is given in the creature’s descriptive text).
Trample:
The save DC against a creature’s trample attack is 10 + 1/2 creature’s HD + creature’s Str modifier (the exact DC is given in the creature’s descriptive text).
Burn:
Those affected by the burn ability must also succeed on a Ref lex save or catch fire, taking the listed damage for an additional 1d4 rounds at the start of its turn (DC 10 + 1/2 burning creature’s racial HD + burning creature’s Con modifier).
Now, how racial HD applies to Polymorph effects is anyone's guess. Neither the section on Polymorph (CRB p211) nor the Beast Shape spell comment on this. Perhaps somewhere a developer has commented on it.
My guess is that you should use the regular creatures DC as a baseline and then modify it by the difference in the ability modifier. In other words: if you have a lower Con modifier the poison DC is lower. Higher Con modifier the DC is higher.
- Gauss

AvalonXQ |

The polymorph subschool description says this (always go read this first when you have a question related to polymorph):
The DC for any of these abilities equals your DC for the polymorph spell used to change you into that form.
The Wild Shape description says what spell it "functions like," and the level of that spell will give you the DC.
4th level: DC 13 + Wisdom mod6th level: DC 14 + Wisdom mod
8th level: DC 15 + Wisdom mod
10th level: DC 16 + Wisdom mod (for elemental or plant; still 15 + mod if animal)
12th level: DC 17 + Wisdom mod (for elemental or plant; still 15 + mod if animal)
I hope that's pretty clear.

666bender |
The polymorph subschool description says this (always go read this first when you have a question related to polymorph):
Quote:The DC for any of these abilities equals your DC for the polymorph spell used to change you into that form.The Wild Shape description says what spell it "functions like," and the level of that spell will give you the DC.
4th level: DC 13 + Wisdom mod
6th level: DC 14 + Wisdom mod
8th level: DC 15 + Wisdom mod
10th level: DC 16 + Wisdom mod (for elemental or plant; still 15 + mod if animal)
12th level: DC 17 + Wisdom mod (for elemental or plant; still 15 + mod if animal)
I hope that's pretty clear.
that is preaty low for medium and upper levels... making poison, trample, burn and such ... kinna useless.
also, are you sure the poison and trample are not STR / CON based?
AvalonXQ |

that is preaty low for medium and upper levels... making poison, trample, burn and such ... kinna useless.
The DC's are equivalent to the spells you'd be casting at that level. Actually, you gain the effect of each level of polymorph spell one level earlier than you actually gain spells of that level. A level 12 caster with DCs appropriate to a level 7 spell is good.
also, are you sure the poison and trample are not STR / CON based?
I'm not 100% sure. The assumption I'm making is that since druid spellcasting is wisdom-based, the spells emulated by the Wild Shape ability are also wisdom-based. This is likely what is intended, but I can't affirmatively prove it based on the rules as written.