Tye and his brother Phil were hot rod enthusiasts, and had just finished the rebuilding of a 1949 Chevrolet pickup truck to hot-rod standards. So together on a weekday Thursday night they drove the repaired truck out into the country to test its speed.
Phil was driving more than 95 mph when a wild deer ran across the road in front of the truck. Phil swerved handily, but left the road surface and drove out into the Alfalfa field owned as farmed by Dave. It had rained for part of the week previous to that fated Thursday event. The fields were wet, as some like what Dave owned were soaked to where he could not drive the farm tractor across his fields.
The old pickup had narrow tires and became stuck in the muddy field. The brothers tried hard to get the truck out of the wet field and back onto the rural country road.
Dave heard the racing engine and smelled the burning smoke of spinning tires. He decided it might be to his own best interests if he were to investigate the situation out in his field. He approached with stealth, seeing the old pickup truck stuck drive axle stuck in the field mud. The brothers were busy arguing about their situation when Dave came up close and said aloud, "Stuck huh, and made a mess of my Alfalfa field. I guess you will need a tow back t the road, and to be quite of help, I could help you muscle the truck back onto the road, okay?"
Phil was quite eager for any help, while his brother looked at skinny Dave and asked of just how Dave could be of any help?
Dave was ready with his reply, as he said, "You two are brothers, and your muscles should do the real pulling, but first you have need to grow, gain body mass, and taunt muscles!"
"We going to wait until summer," Tye asked, his tone being like laughing at Dave.
"Oh no, we should finish the job tonight, but you two need to get growing!" Dave said, as he flicked his devil familiar to begin causing both boys to gain body mass, hearty muscles, body fur, tails, hoofs, and the physical disposition of becoming sturdy Jackasses.
"Hey ow, what the hell is...," Phil yelled, he seeing his shoes fall from off his changing feet, as heels became hind hocks, feet elongated, and his toes merged to form a single toed hoof at the end to each feet.
Tye tried to make a dash across the wet field to get away, but tripped and fell face down in the field mud.
As both brothers screamed from panis and cried, begging Dave for mercy, the bulked with new more equine type muscles, necks gained length, as human faces changed to be something their own mother would never know the two Jacks were her sons.
Screams changed to agonized brays, and the changes continued, as Dave saw two reddish furred mammoth donkey jacks were fast maturing before his elated eyes.
"Hey there boys, take a good look along your new flanks, see that you each have a tail, and down under, your genitals have grown along with your massive bodies. Now then, know that escape is not possible, so follow me to my barn where I will dress you with the proper harnesses to then pull your truck free from the muddy field." Dave told of his farm animal friends who were the two new giant donkeys lingering in a corral.
Friday morning and Dave reported he removed an abandoned pickup truck from his field. The local police arrived, as well Mr. Manson, the father of his two sons who were later that weekend as reported missing. After the police finished their report, and Mr. Manson drove the old truck to his home, as Dave went to have a talk with his two new animals.
"Boys listen good, as your father drove home your pickup truck, he being quite upset that you left the scene and were goofing off somewhere. What was that you wished to say Phil, as how long, like for the length of you both staying here as my new mule team? You likely want to return home and face the disdain of your father, but I have a different plan.
You need to understand a basic fact about magic, as Devils, and transformation of humans to being as animals, the transition is quite permanent!
As yes, I had you both transformed, you are by breed and species as Mammoth Jackass donkeys, both male studs, as I plan to lease you both for breeding services, siring mules and donkeys.
You can accept your situation and do for me what I want as done, or try to fight me, and learn how much pain an equine male animal can bear when the Vet comes to cut off your big balls. The thought of being castrated rather than becoming a breeding stud had both donkey brothers trying to make Dave smile with joy.