I think the word you are looking for is "improper." Unlawful means that a legislative body has passed a law saying that an improper act is against the law.
Now we can argue about whether tests are so accurate that they can be used with surgical precision to remove diseased birds while leaving others alone. Last I read about this, they are not.
Now we can argue about whether tests are so accurate that they can be used with surgical precision to remove diseased birds while leaving others alone. Last I read about this, they are not.