How does this work ?? 
all other regular pets funnily enough have actual dmg when looking at their weapon attack/WD in page 2 in GT, and i was under the impression all pets now had part phys dmg in their WD, but Birb got nada dmg, at all ?
how does that work when both its main attack and zappy skill has %WD ?!? @_@
That should be the Flat Dmg your Pets have.
Birb doesn’t do any Physical damage by default and is purely lightning.
but how come all the other other pets by default have flat dmg/“usable weapon dmg”, and the birb doesn’t, despite having WD in its main attack and zappy skill ? 
that basically means, unless aware of this little snag, you can go a long time without birb actually getting any flat/getting to use and apply its WD?, yet all other pets have it from start - it also means birb’s actual WD effects are much lower than other pets with default WD, seems like Birb’ism to me 
Have to ask Zantai that 
You’re hoping I’ll explain how Grimtools parses something? 
My guess is GT bases it off of basic attacks, which the raven doesn’t use. It casts a projectile skill instead. You’ll probably find the same “issue” on other ranged pets.
so what you’re saying is GT isn’t accurate, because somethingsoemthing, and the Birb does infact do “some” WD at base points?
