That makes it time for flavorOr do we want to do "papa" shroomling before we do fluff?
I dont think they need any DR.
Special Qualities: DR X/cold iron
Environment: forest caves (anywhere a shroom could grow)
Organization: Solitary, hunting party 3-12 or swarm.
Challenge Rating: looks like around cr 1/2 or 1
Treasure: None
Alignment: Neutral (maybe CN)
Advancement: By class
Level Adjustment: +2 (?)
Let's go with DR 5 and call the largest group a circle.
I don't think we've made this feat mistake with too many critters, since we don't convert that many with +0 BAB. But we should look out for it. In any event, I'd rather keep Weapon Finesse as a bonus feat, since that's pretty standard for little critters. How about we replace Weapon Focus with Point Blank Shot?
We still need a number for the circle, how about:
Organisation: Solitary, hunting party (2-8), or circle (5-20 plus 1 gorri shroomling)
Well the +1 damage won't be much use since it has a -3 Strength Penalty, but it's still better than nothing.
Or we could give it something non-combat that's useful for living in the wild like Alertness, Run, Self-Sufficient, or Track.