It takes a little practice with the bow. Remember to hold down the left mouse button to pull back the string and shoot further. I am hunting them in this video (go to around 11:45 if you wanna see, how I take them down):
I am not good at seeing the trajectory of the bows/darts either...the light from eating blue mushrooms is only helpful during the night or when trying to find arrows on the ground after missing. But yeah it just takes practice to get used to it.Ryan will be making some changes to the building system in an upcoming update - I complained about picking up building pieces by mistake too LOL
Resources don't seem to grow back, but farming is planned for the future from what Ryan has said previously.