I think that many adopters would pay for the cost. And add to that if it is a situation that a person has contacted BRAT to give up the dog and he/she is not tested then they should be required to put up that fee.
I think that BRAT does an excellent job in most respects, however this is one point that I really disagree with not testing. I am not sure that they would agree to test even if people covered the cost
J