Was she wearing bright shoes or nail polish? At 15 week, it most certainly hormones, it most likely get worse especially as he fills out and learns to use his feet and wings as weapons. (not all roosters get big spurs though) He calm down in the winter though.He seems more interested in her feet then her body/face.
Shes pretty tall but this is new behavior that we haven’t seen before.
He’s been great with her up until today.