I didn't read all 9 pages but I'm a bit familiar with Louisiana laws. Poisoning a dog is illegal, even if a nuisance dog comes on your own property. Shooting or firing at a dog or group of dogs while they are chasing you (threat of serious bodily harm or death) on a public road is legal. I would do what the OP did, and maybe send a letter to the address where the dogs are coming from and inform the resident of the problem and your intended solution. I would not sign my name and I would not mention that I'm on a bicycle, only that the dogs come after me when I pass the address and I intend to protect myself.