Just as much as testing without outcrossing is not sufficient, it is the same vice versa. Even though outcrossing is the most efficient way to breed away from genetic problems, testing for genetic diseases is still required. Even though we have a good idea where heart problems in our pedigreed cats came from, there is a chance that a foundation cat could be diagnosed with HCM or some other heart disease as well. The fact is that we have enough problems in our breed already. So we want to carefully watch not to double up on weaknesses in certain organs or body parts. There is no point in outcrossing if we don’t go all the way and use all medical science available to reduce the risks of genetic problems. Also, remember that testing without appropriate selection is a complete waste of time.