Is your pastel yb an adult? My adults are just starting since the strike in december. The younger ones are tanks unstoppable. It is just the way they are. I don't worry too much I try to get 30 meals a year that's it. If one whom is always the first out and last stopping he sometimes gets a extra tidbit here and there when he is eating to try to get that last few meals in. If they don't show much interest that is it on to the next. Weigh them that is the best indicator of health if they are not dropping much weight there is no problem.

Side question has your local temps outside weather been cool at night lately ? We have been having rainy day after rainy day here and mine whom in other years would have been eating regularly by now are still off, curious if there might be some relation to temps and weather.