One day out of the year, Macintosh Apple has to be extra careful. He can't sell apples in town, he can't run errands, he's loathe to even leave the farm. Is it spring? Are the mares of Ponyville marauding for the flesh of stallions, hopped up on hormones and dandelion tea? No. In fact, the reason is far more embarrassing. But it isn't poor Macintosh's fault, you see. The fault lies with a reformed lord of chaos, and his lack of understanding (or empathy) of the after-effects of his unique magical powers.
Chapters (1)
Heh. Heh heh.
EDIT: All right. That was entertaining. Kinda reminded me why I hated dogs, but Mac was written cutely enough that I could get past that.
As always this is an amazing story! I am loving the mention of MacDash here and there, but I am begging you good sir! We need a oneshot MacDash from you! But as always, love the stories!
That was funny. Great job. I liked how Mac was still a dog and Discord was still up to his old tricks.
I regret nothing...
5858349 nor should you. I needed a lighthearted one shot before I got back on the old grind.
5858170 I can't promise anything, but my founding ship shall not falter on my watch, friend.
5858406 Good because your kind of the captain of this ship lol
I can see Discord choosing to misinterpret the Apple's demands of 'Fix Him' as not meaning 'remove the magic'. Poor Mac. Twilight never had a dog, so she didn't know that you should always watch the door when they are around.
You know it's a good story when the characters are written so well in character that the voice in your head sounds like said character, Well written.
Pft. Please, Dash, we know you liked it.
Knew it.
"with no memory of what you did while you were in that state?"
Why the hell does everyone use that? Why? Why? The whole "no memory" thing? For every single time someone's behavior is affected.
5858073
Dandelion tea? What's so special about that? Or is it just the author being random?
Good job!
Very cute! Though, why didn't Twilight just teleport them back to the farm?
Not complaining, mind you, going back to the castle seems exactly like the sort of thing they'd do, just wanted to point it out for anyone who might not've considered it. 
Also, Dash was a total surprise. Cheerilee is probably having... mixed feelings on the matter as well. Oh Mac, you dog you!
...
Please keep writing, I'll keep reading!
When I was learning the names of the generations of the K's previous pledge classes, I had to learn about the Reservoir Dogs. I still don't know where that is from.
6461021 are you telling me you've never seen reservoir dogs?
6461074 my grand big is ashamed of me. Or would be if I admitted that
I'll withhold the fury of 1000 suns as long as you watch it. Its one of tarintinos best before pulp fiction
Well, this was a kinky little story, funny too! Funny in how Mac was apparently the only one still affected by Discord from when he was still "evil", nopony else included, being a dog for one day a year! And kinky with...
On top of other naughty references within the story, such as the dog marking his territory and collar with a leash things!
I do wish we could've seen what Mac would've been up to on the farm, even if it might've been stale, if he didn't have to get out of the house on Applejack's mistake (which was your choice), but it was still a cute and funny story. Though I'm kinda surprised the Flim Flam brothers were within the story and apparently didn't recognize Big Mac from the times they encountered him before, even if he WAS behaving differently.
Anyway, good ending with Mac getting his last bit of dogness out of him, after realizing there was a loophole Discord found since AJ hadn't decided to ask him. And a small kiss from Rainbow!
Another gem from you, Bronius/Maximus! 
PS: You apparently didn't click reply to the message before mine, just fyi.
Royal flank, the local school teacher, and the one and only Dash. Mac gets around when he's a dog.
The story of why he has a black eye will be fun at breakfast.
No leg-humping?
gifrific.com/wp-content/uploads/2014/01/Dug-I-Do-Not-Like-The-Cone-of-Shame-Up-2009.gif
6049721 petplay fetish is a thing.
Discord is such a great guy; I hate it how everyone judges him and puts him in stone. Eeyup. Apple Jack is the real menace. You'd think somebody would tell Discord.
Nicely done.
The story did not disappoint.
5865551 WorldWalker128
Dandelion tea is typically mostly a spring thing, brewed from the first leaves of the dandelion, since that's one of the first spring plants to grow and bloom. The older the dandelion plant's leaves, the more bitter they become.
9314554
ah.