Err... What? It was a good clopfic, in the sense that it has a lot of sex, but it isn't very well written to be honest.

>>Big mac shoved his huge duck into Applejacks stallion hood

You know, I don't think aquatic birds enjoy being shoved into things. Not to mention Applejack not having a "stallionhood", considering she's a mare.

I like clopfics as much as the next person, but this was horribly written. As someone else said, you've certainly got the sex part down, but that means nothing if the story isn't written well. I'll list some things that I think you should change.

1. Make sure the chapters are in the proper order. Right now you've got the prologue coming after Applejack's chapter. That needs fixing.
2. Work on your spelling and grammar. Use a capital letter to begin any name. It should always be Applejack, Big Mac, and Discord, never applejack, Big mac, or discord. Try and cut down on run-on sentences. This will really help make the story easier to read.
3. A 36 inch dick? Come on, that's a completely unrealistic size. I know horse penises are larger than human penises, but still. Applejack's asshole should be torn, and she should be bleeding internally if she took the full length inside of her.
4. While I don't exactly like incest, I'm fine with AJ and Big Mac having sex with eachother. It's not my thing, but I'm sure others enjoy it. However, was it really necessary to include the reference to Sweet Apple Massacre? Clopfics are supposed to be about sex first and foremost, and most people don't exactly find rape and murder very erotic. It's entirely up to you whether or not you keep it, but you should ask yourself if it's really necessary.

Consider making these changes, especially 1 and 2, and I'm sure your story will be substantially better.

My boner just died. ;~;