I took Chester, a member of my rooster-only flock, out on a leash once. He actually really enjoyed it, mainly because there were a lot of bugs at the beach, which is where we took him.
I’d love to see a picture of your’s on the leash.
I wanted to add that it has also been my experience that...
Honestly, that sounds pretty normal to me. Hens will mount each other for dominance, and I have multiple crowing hens right now. Spurs and curved tail feathers aren’t specific to roosters.