Hi Pinkie and welcome
Alot can come down to personal preferences, and different people will tell you different things.
Both
ANB and
INBA are established feds in Australia and pretty well respected.
WNBF is far newer to Australia and less established, but is an established fed overseas.
If this is a priority to you,
INBA seem IMO to be the tightest of drug testing of the three, I make this statement as since we've been running this site the
INBA has issued a number of bans for positive tests...
Also can depend on the area you are in, as alot can depend on the promoter and region...
Another option you have, is to "fed hop" and do more then one show if the timing is right. Test out for yourself type thing...
I am sure someone will come along and give you some more explicit advice on the feds...but I hope that was some small help.