MNkris, now I am breathing easier, even though I got my first purchased birds from Dixiebirds. I will contact the owner to see what they use since Brandy was found in a park, so there's no way to know if she was vaccinated or not! I know the owner knew the whole story of Brandy, so I'm hoping he would have advised me to keep the birds separated if there was a possibility of them giving Mareks to her. The good news is that none of my birds are sickly (at the moment!).