Oh god, what. What did I just read?
You just read "Cupcakes." A fan fiction of My Little Pony about Pinkie Pie bringing Rainbow Dash over to make cupcakes, but Dash gets drugged to sleep, when she wakes up she's in a dark room, tied down, and then Pinkie Pie pretty much kills and eats and dissects Rainbow Dash, but gets sad that her best friend was gone, then makes a stuffed Rainbow Dash, then gets an idea to make all her friends into Stuffed versions.
tl;dr:Read the damn post.