Despite being probably one of my top three favourite mounts in Heroes, I think I'm giving up. I really like the rooster mount but after chain queueing a bunch of AI games, seeing the rooster once out of all those games, and failing despite everyone working on it, I probably am not going to try again unless they make changes. It seems like it would be a huge time investment to get 25 successful completions and I like Heroes but not like consume-all-my-free-time level of like.
I bought the golden chicken though because I needed a chicken. I'm glad they at least offered that one for gold.