I don't believe your 8 year old kid, has the strength to use a long bow to kill a deer. A Compound bow or crossbow I could believe but not a longbow.
This.
Even a compound bow would be hard to believe. I have no doubt plenty of 8yr olds are good shots, but unless your daughter is a genetic freak, I really really doubt she can pull back 30+ lbs of draw weight.
Story would be a lot more believable if you said crossbow.
We dont do crossbows, and again, Iroquois longbows are made to suit the user. Not some mass produced, store bought bow. A bow meant to match her size and weight. Wood picked from the Adirondacks and hand made by a life long bow maker.