Several years ago i was experimenting with different fletchings and shaft materials. One of the trials was with a dog fennel shaft and 2 right wing turkey fletchings. I was surprised that the dog fennel made it through a 20 shot 3-D course, and somewhat pleased with the 2 fletch. It seemed (as someone else said) it shot well when I shot well, but worse than a 3 or 4 fletch, when I didn't. Also, if you damage one of the fletches of a 2 fletch, it affects your accuracy more so than a 3 or 4 fletch
Oh, later on that summer I shot that dog fennel arrow through a raccoon that I thought might be rabid. The shaft made it but it damaged the fletching
James Parker is who I learned about dog fennel from. He is knowledgeable fellow.