Safe treatment for all birds

[CandoAviary]

If I bring new birds in I always quarentine them seperate from the rest. I always treat for air sac mites because these are very common and easy to treat with little effect on the birds and no immunity buildup. I then monitor the droppings ( a microscope is handy for this) If I find worms, cyst, protozoan, etc. then I treat accordingly. Usually a long 6 weeks is my protocal. This gives plenty of time to ensure the bird is healthy. Also this is a good time to accustom the bird towards the new diet, water, etc, that it may be eating once introduced into the flock. 6 weeks is usually enough time to also monitor the birds weight and eating habits... eating lots without gain will alert you to serious problems that you don't want.
I would never atomatically treat for something the bird may not have. I also am cautious of just throwing newbies in with my beloved birds.
Everyone has their own routine or nonroutine... you have to find the one you are comfortable with.