Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!
1)It's impossible to say what it is from your description, but I can tell you it is not active.
2)It would take more than a week if it worked at all. Fertilizing with cow manure is a good way to increase mushroom growth in your lawn, but the chances of producing active mushrooms this way are very remote; viable spores would have to be present in the manure or floating around your yard, and you would also have to maintain a suitable environment for growth.