Sure.
While we await Cleon's opinion on the poison, let's finish up a few other missing bits:
Good ideas. How about Climb 2, Intimidate 2, Swim 4 and Weapon Focus (shortbow)?
Sounds good.
At 3 ft tall, I'd just take a halfling and add about 20-30 lb for the weight (make them a bit chunky). So 55-70 lb?
I think we might be better calling them Slowing Poison and Slaying Poison.
Also, if the slowing poison is for use against big game, I think it should have a higher Fort DC (since large animals tend to have very good Fort saves). I'd also consider giving it a DC bonus against creatures with the Animal type.