Turns out Big Mac is a big hit in some of the local towns! It's possible he might not want to sample too much of his own product, though. Enjoy!
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"Oh, I had been wondering when you guys would stop by again! Say, do you have that caramel apple pie this time around?"
"You wouldn't happen to have anything for someone that's allergic to apples, would you?"
"Oh, how is dear old Granny Smith? She's got to be getting up in years! Do you have any of her special cider?"
"Look at you! Boy, you're looking hearty, Big Mac. Tell you what, what do you eat? Whatever it is, I'll take a dozen."
Big Mac did not consider himself a particularly charismatic guy. He didn't exactly have a way with words, and he was fairly certain that just about anyone in the family was better with sales— but the people of the Mareland region really, really seemed to like him. He kept catching customers' eyes drifting away from the products he unloaded from the wagon towards his hips and rear— he was half afraid he had split his jeans, they had been feeling a little tight lately. He just wish he knew why so many people kept insisting he get them the produce or boxes at the bottom of the stack, with him having to bend each time just to get their order.
Business was far better than he expected, though— and he had already been feeling optimistic; his family did produce the best apples in Equestria, after all. He certainly knew that— being on the road, he often chose to feed himself from the family stores. Granny Smith had made certain to pack all his favorites, and plenty of them, especially the caramel apple turnovers. Those he had been eating by… Well, he had lost count.
It wasn't a problem. Sure, he felt slightly bloated, but he was getting plenty of exercise, hauling around the huge wagon. Besides, he was making sure he had plenty of experience with the products— that made him a better salesman, right?
"Hey big guy, can I get a baker's dozen of the fritters?" one of his last customers for the day asked.
"Eeyu— Oh. Huh." Big Mac turned around, his brawny frame filling the space of his stall, his extra padded torso and broad, barndoor back stretching out his shirt, the concave curve of his middle brushing up against the shelves at the same time his meaty chest did. "A-actually, looks like I'm out fer today. See somethin' else you like?"
The pony opposite the stall counter cleared his throat, trying not to stare over-long at the massive earth pony's extra thick back, his meaty muscles augmented by the extra pounds, hefty haunches, and round rump filling out the denim of his jeans to bursting. "Uh… You could say that…"