Hopefully it's just a cockerel. Here's my slower feathering BCM roo at about 3 weeks, give or take. I can't recall what his tail looked like but I know it took longer to grow in than the other four chicks. Here's how he looks today. His tail is still growing in at 20 weeks old. He had 2 long feathers come in right away like a cowlick but they molted.