I was out with my flock today and I noticed that Hephaestus went into a dog kennel that we keep for an emergency chicken carrier (it had pine shavings in it) and was calling the pullets like he had found food in there. When I walked over to see what was going on he was in there methodically moving the shavings to the front and around the sides, sliding his body around to make a bowl shaped space, then he laid down in there while making this soft, insistent tuck-tuck-tuck noise. If the pullets wandered away, he would call them back with the "I found food!" call. He kept this up for at least 10-15 minutes. The pullets seemed mildly interested, but no takers. Is this normal behavior? They are all 25 weeks old today.