There is an issue in Sandbox Nublar where most dinosaurs comfort bar goes red with a question mark. I was wondering if it is a bug and if it would be resolved in the next update?
This is not a bug. This only happens when you change the stress of the dinosaur to 0% or below. this can also happen if you change the social of the dinosaur to 0-0. Doing either of these can give you an achievement.
