Hi Peter, I hope you are doing ok pal, as you know i show my pouters and in the past i would maybe or maybe not jag them but to be honest since i started in the racing i have jagged my showbirds and have never seen them going down, to be honest i feel more comfartable them being jagged as i do not know what condition the bird in the next pen is in and i would (asYou) would not want my stock wiped out-----worth thinkin about. Me personaly think every bird kept by a fancier should be vaccinated JMO