User blog comment:BonesMcGee/Brainstorm: Potential savings in using the hurry hatch trick/@comment-5180284-20121103062208/@comment-5200570-20121103155949

No, all the ghost dinos are still active. It's just pure, dumb luck that you didn't discover any. All of them are a possibility of 1 (except Ghost Mammoth), so it just seems it really wasn't your day.