"Shelby the Shetland Pony: Episode 1: Once Upon A Time..."

Once upon a time, there lived a Shetland pony. He was bought by a farmer in his Idaho homestead.
A few years later, the farmer's daughter was taking the pony for a stroll around the yard. As she took her pet by the collar, its head shifted to the left, towards the fence behind the homestead and facing the Olafsons' home, shaded by oak and maple trees. There was a barbecue going on, as the youngest daughter, Candace Olafson (from a daycare centre) had her birthday party. What caused the trouble (for now) was ―
Sniff sniff, went the pony's hairy nostrils.
"Shelby, we're halfway done with our garden stroll," the daughter replied. "Come on, come on, come on!"
She then noticed on what the pony was staring towards:
After the party, Jonathan, Reginald, and Arthur were done playing "Pin the Donkey's Tail", and are now going to sit on the picnic table. They opened a plastic box, and feasted on the sandwiches.
Meanwhile, behind the vine-ridden picket fence, a pair of equine eyes (along with that of his owner's) look on.
Sammich. Me want sammich.
This is why the pony was eagerly peeking on the other side, hungry for this delicacy.
"Let's go, Shelby," the daughter said, tugging her pet with her leash, "We've got half a round to finish."

One month later, the daughter had just returned with her dad from her baseball game in Montchalons Stadium, which is just around a 20 minutes' drive from the Bjørnson homestead. While her father was planting crops and she put the few souvenirs away, she took out a little box of sandwiches, and walked to a wooden table. As she ate her sandwiches, she noticed Shelby trotting towards her, from the apple tree to the white horse-picket fence, by her left. He let out a little, yet loud, neigh.
"No, Shelby. Meat is not good for you, nor are tomatoes. If you eat the sandwich, you will fall ill," she replied.
The pony stubbornly neighed and snorted some more, this time somewhat like the pigs on the pigsty. She still continued to eat one of the sandwiches, saving the rest for her family, and walked back to her house.
The disgruntled pony loudly squealed in anger, startling some corvids on the apple orchard, who cawed as they fluttered their clutter of flapping wings to the cloudy, sunlit evening sky by the mountainside.
The farmer now reads a book on the rocking chair and in the old-fashioned living room by the 2006-made TV and the fireplace after a long day teaching his two younger sons on planting vital crops. A border collie sleeps on a pillow-stuffed basket by his side.
His irritated daughter returned with a complaint,

"Dad,"
"Yeah, sweetie."
"We've got a problem."
"Go on, say it."
"Shelby wants to eat sandwiches."
"Maybe if you could refuse his bizarre want, he will stop."
Her dad's advice failed. Shelby still whines for sandwiches, even after a month has passed.
Oh boy, the girl thought, I'm gonna need a vet.
Will the pony end his sandwich addiction?

(From Mistvan, http://upload.wikimedia.org/wikipedia/commons/b/b8/Shetland.pony-05-Castolovice.jpg)

(Updated on 21 October, A. D. 2013.)

(Updated on 10 November, A. D. 2013.)

(Updated on 28 November, A. D. 2014.)