The sounds of singing birds engulfed the vast majority of the woods, along with the sound of audible panting. This was coming from a lone stray husky dog as they roamed around. His name was 'mono' (short for monochrome) due to his sleek black and white coat of fur, and bright white eyes, despite being a stray!. He referred to being alone, often avoiding the drama of other strays, and enjoyed the beauty of nature itself. As he wandered more, he soon began to feel thirsty. Wanting to quickly quench his thirst, mono went and searched for the nearest water source. After what seemed like an hour, they stumbled upon a nice flowing river. Wagging his tail in delight, mono wasted no time rushing towards the river to get a good drink. But as he did, he noticed something...strange. On the other side of the river, he saw what looked like giant paw prints, and what looked like weird white puddles of indistinguishable liquids. But by now, he was too thirsty to care, and began to drink away!. As they drank, they were oblivious to what was inside the flowing river. Radioactive waste, and mono was drinking straight out of it!. After quenching his thirst, he sat down, confusion running through him as his heart began pounding. Panting as his heart began to pound faster, he felt a numb yet tingling sensation build-up, gradually intensifying as time went on. Suddenly, he stopped panting, eyes going wide before closing shut. He growled loudly as his muscles began to swell up. His bones reshape as he abruptly grows bigger in size. He stopped sitting and howled, the unfamiliar but pleasuring sensation course through him as multiple physical changes began to kick in. Looking downwards, his fangs became much sharper and intimidating, his rear also seemed to swell up in size and muscle, giving him a large bubble butt. his already pointy ears grew even more pointer, becoming very large in size. His tail grew larger, curling up and becoming something to that of a spikey ball. his muzzle grew more, becoming long and pointy!. He quickly shuts his eyes and opens them back up to reveal bright electric blue ones, as his genitals began to tingle as well. He looks down as his balls swell up bigger. Shocked, he proceeds to lay down on his back to get a better look. Blushing wildly, he watched as his once golf ball-sized balls swell up immensely, becoming a very large pair of yoga ball sized ones. Now panting from arousal, His canine member slowly becomes erect. As it did, it seemed to swell up much bigger than normal as the knot came out from mona’s sheath. Now fully erect with 8’0” long cock, he becomes horny as it throbs up and down, leaking pre on his furry belly. Out of pure instinct, he brought both of his paws to his member and began stroking it, growling in lust. As he did so, his muscles continue to swell bigger and bigger, his pectorals jutting outwards, and his abdomen rippling in to define 6 pack abs. Lulling out his tongue and closing his eyes, he stroked harder and began to hump the air as he reached closer and closer to climax, filling the air with immense dog musk. A few moments later, he growls loudly before letting out a booming howl as he finally came. throb after throb, his cock let out a torrent of dog seed which launched out for miles, covering whatever was in the distance in white. After an entire minute, his orgasm subsided, panting heavily and blushing a deep red. Never had he ever felt so closer to heaven in all of his life as a stray.  Now standing at 10 times his original size, mona was amazed by his new form. From his now giant bulging muscles, his new and intimidating appearance, and most of all, his large oversized manhood!. He wagged his tail in glee. Now he can enjoy the beauty of nature from a MUCH larger point of view!