NO ONE ever enters my property inside the fences. It doesnt limit our ability to show available birds, or how we house them. Bio Security is a real threat and with 1000"s invested in birds I wont risk something being carried in on shoes of a customer ever. My birds health is worth more than that. We move holding pens and cages out where customers can see them with out ever entering our fenced in areas. Allowing people to freely walk where my birds free range and or are housed put them at risk of catching something. It is highly advised to practice good bio security, allowing anyone and everyone inside the fences is not good bio security. with that said, we are lucky that we can stand outside the gates and see all of the rear (minus one area along the south of the house, but no houses are there) this allows us to chat with customers discussing the ducks, geese ect without jeopardizing their health. If you read up on the USDA NPIP and bio security recommendations you would understand this.
I research everything and do so for hours on end actually. My posts are based on first hand experience, knowledge shared by others and research both online and in talking with university and avian vets. Implying I dont research is acting childish on your part, and saying my statements are false. Doing exactly what you accused me of doing to you. (which I didnt but its OK if you want to be that way) Letting people know there are dedicated threads on BYC to a specific bird is just good form so they can go chat with those who breed that particular variety.
We too have permethrin, but chose to not use it where the geese can graze because personally I dont want to risk a 300-500$ goose if there is een a slight chance it could harm them. Which is why I mentioned reading the usage label before spraying where GEESE could graze. Never said it wasnt effective or couldnt be used, but to double/triple check where the geese could be eating. Too many recent posts in the goose area discussing poisonings.
UC Davis - leading university on poultry - bio security write up -
http://animalscience.ucdavis.edu/avian/pfs26.htm
APHIS/USDA Bio Security write up -
http://www.aphis.usda.gov/animal_health/birdbiosecurity/biosecurity/