we have to vaccinate them , but have to agree with silverwings earlier on, its very easy to get a "bad" batch, and theres no way we have of knowing that, we just pay our money and take our chance, or rather they take our money , and we take the chance. and as wings said, i dont think they need , all this vaccination ,every year, i think after being vaccinated as ybs,, each year , half the dose would do. but were forced to do it so theres no argument. money talks,,,,,,it says goodbye ;D ;D ;D