פירוש על קידושין 113:9

Resh Lakish explains that the baraita refers to a case where the bird was found to be flawed inside. This means that the bird was never holy and therefore it can be used after.

With the bird sacrifice, one must bring hyssop, cedar wood and scarlet thread. If one slaughtered the bird without these things, the rabbis disagree with regard to whether the slaughtering is considered slaughtering such that one may not derive benefit from the bird. But what is clear is that both R. Ya’akov and R. Shimon agree that the bird is not prohibited until it is slaughtered.