Stephen cried out as he tried to move his arms and legs only to find that thick steel chains dug into his soft white fur and his tender flesh. And still the boy still struggled against the bonds that held him in place even though he knew that fighting was useless. His nose picked up the sent of cleaning supplies and he felt a thick black cloth across his eyes, the boy cried out more and tossed his head from side to side before a thick metal bar was forced into his mouth and then the blindfold that cut off his sight was quickly removed. The boys eyes burned as they adjusted to the light and he gasped in horror and tried to shout as he noticed that he was laying naked in a operating room. A large rat stood net to the table that the boy was strapped to and he quietly examined him before pulling out a small tape recorder and speaking clearly in it “The date is may 4 2111, My name is Doctor Franklin and I will be carrying out today’s Tests. The subject is a male lion age 7  height 116.85 Cm, weight 24.72 Kg, Eye color is green and fur is tan, his body is in proper propitiation and the more intimate measurements are in my report.” Slowly the rat moved over to the set of cabinets along the wall as the cub tried to scream, but the thick metal bar in his mouth that pinned his tongue to the bottom of his mouth caused him to choke on his saliva a bit and caused him to bite down on the bar as he coughed hard. Slowly the doctor filed a syringe with a thin amber liquid and checked the amount a few times before saying into the recorder “Now administering 40 cc's of proventus.” just before in injecting the cub with the fluid.
The cub moaned as the liquid flowed through his arm, It felt cold and it quickly spread all over his body. His legs began to tremble as the cold feeling settled into his growing. As this was happening the doctor pulled out a camera and started to film the boy as his body began to shake more and more, Slowly the boys sack filed up as his testicles descended earlier than they should have and the boy moaned around the gag as his small nuts began to swell. His orbs slowly churned  and expanded stretching his sack until it was as tight as a drum and could barely contain his tennis ball sized nuts. 
Dr. Franklin panted and reached into his pants and rubbed at his fully hard length as he prepared another dose of the drug. Lust burned in his mind as the boy cried and looked at his swollen balls. Heady mus wafted up from the boy and made the air thick and caused the rat to throw caution to the wind, Quickly the dazed doctor filled and iv bag with the drug and attached it to the cubs arm as quickly as he could. The rat panted as he quickly pulled off his clothes and garbed his 12 inch cock. The doctor pounded his paw up and down his slick cock and moaned as he started to lose all control of himself.
The cub wimped as he saw the needle and stared terrified at his crotch as his balls grew heaver and heaver, slowly they creeped across the table and were soon the size of basketballs. And still they continued to swell soon the slipped over the edge of the table and hung painfully from the boys body. Stephen cried as the tremendous weight of his bolder sized balls pulled at him but the pain did not last long before his balls grew large enough to rest on the ground. The boy gave out a small sigh of relief but soon that was washed away by the horror of his balls expanding more rapidly than before. In no time at all the boys balls expanded until they were had a diameter of 6 feet. Sobs shook the boy as the rat screamed in pleasure as he approached the boy and gently patted his gargantuan balls. 
Stephen moaned loudly as his super sensitive flesh caused his cock to slip out of his sheathe. The boys cock reached its full 4 inches and it throbbed and shook as clear precum shot up into the air and splattered on the ceiling before raining down. The doctor moaned as buckets of hot pre rained down nonstop and coated the floor in a thin film. Wanting more the rat licked and kneaded the boys balls with his whole body. More moans escaped the boy as suddenly the pre stooped, the boys balls quaked and trembled. His balls moved in waves as his cum churned violently, and then suddenly his cock erupted. Thin high powered shots of thick creamy lion cum shot into the air with enough force to crack the ceiling where the spurts rocketed into it. Spurt after spurt of cum stretched the boys cock until a fist could fit into it and yest the volume of cum still caused the boys cock to budge as his cum pumped up out of him. The boy looked about in fear as he saw the cum ran down his body and flooded the room, higher and higher the level rose until the room was filled with 3 feet of cum and yet the boy still sprayed more and more of his cum out. The boy cried as he faced drowning in his own cum when he heard a click and saw the rat unlock the steel door that locked him in the room. And with a boom the door was tossed open by the force of the hot seed. The hot lion jizz quickly rushed out. The boy sighed and closed his eyes before drifting off to sleep as his balls continued to empty of the next 45 minutes.