Congratulations on earning the golden Furious Chicken!
I also have the Furious Chicken, but not gold foil version. I earned it from some reward, but I do not even remember whether it was a daily quest reward card or season end reward card. Nowadays I rarely play Steem Monsters/Splinterlands.
Fun fact: I read your blog post from PALNet, and I saw a Splinterlands advertisement under your blog post (above the comment section). That is not your advertisement, just placed on the page. I do not know what is the point of that. Your blog post is already about Steem Monsters/Splinterlands with your referral link in it at the end of the blog post.
!trdo
RE: Finally, the chicken that lays the golden eggs