My four baby chicks (ages vary from 2 weeks to 5 weeks) are loving their new roomy coop. We sit outside (in the coop) with them on and off during the day. I only leave them by themselves if I am working in the yard. Other than that, they are inside. Tonight around dusk, we went out to the run and sat in our lawn chairs talking before scooping them up to bring inside. All four started making a new sound, which was a higher pitch chirp (almost frantic), and hopped onto our laps. They normally snuggle up to us at this time of night, but they were crawling all over us continuously chirping as if something was wrong. Is this typical "dusk behavior" or am I missing something?