Well, actually, we dont want to veer off course from the OP's thread. The disease debate is a subject for another thread, so sorry for getting a tad sidetracked. Anywhere you can keep the birds from sharing dander or breathing the air in the close vicinity is a good place to quarantine your birds. Some can do this easier than others, but I used a big wire dog crate in the bsmt when I bought the one and only grown bird I've ever purchased.