Note: This story was dynamically reformatted for online reading convenience. That night a farmhand came to the barn to get me. Leash on my collar he led me to the house and up to the bedroom. Master was in bed with a farm girl. The farmhand tied the leash to the doorpost and walked out. It was totally dark. But my eyesight had become so acute these past months that I could see clearly, as in daylight! I could see Master, handsome and virile, with the farm girl. He was kissing and fondling and fingering her. Master's cock was a mere nine inches or so, really cute and delicate after all I had been doing and seeing all these afternoons, stood proudly erect. I admired him so much, his small 9" cock throbbing. I knew he wanted to mate with the farm girl: it had seen it countless times on the farm and even helped out quite a few males. They went at it and I stared, admiring Master. Soon, all too soon, it was over. Master motioned me over. I untied my leash and leapt on the bed with them. The farm girl was laughing. She straddled my face. "Lick her clean, bitch-sow." My mouth went directly to her pussy. I had never eaten another woman before, but knew what to do. Eagerly I lapped her juices and Master's cum from her pussy. It tasted so good, so strange but so good. She was moaning and tossing again and again, just like she had done with Master a few minutes before. And I just kept eating her. She finally screamed and leaped to the side before I could get a hold of her. She lay in a heap alongside Master, moaning how good she felt. Master smiled and turned to me. "Lick me clean, bitch-sow." Instantly my hands went over his hips and I lowered my face onto his perfect and beautiful cock. It was soft and weak now, tasting perfectly clearly to the farm girl's wetness and his own cum. I licked Master's cock and licked it and licked it yet again and again. I licked his balls and back to his cock, back and forth, my hands working his cock expertly. Master tried to push me off. I was way too strong for him. Months of training and my "special diet" had made me way too powerful. And months of masturbating male animals made me understand each cock perfectly. In no time, Master got hard again. And even though he tried so hard to get me off, I was too good for him. Master was ejaculating in my mouth! His was not that runny, drippy cum of the German shepherds, nor that manure-tasting cum of the horses, nor the grass-lemonade cum of the goats. Master was creamy, thick, smooth, invigorating! Master was desperately trying to shove me off. I was too strong for him. And I wanted every last drop of his ejaculate - and then again more, like I had been practicing with the male animals for months. Master went out of his mind. He needed to regain control over me. He reached over and grabbed the remote control. Two quick turns and my udders went on fire. Shaking deep down inside my teats, powerful shocks shaking my udders and teats and entire body. I sprung out and up and away and went flying against the wall, crumpling on the floor, desperate to relieve my torment. Master walked over to me, looked at me writhing on the floor, smiled and went back to bed. This went on, night, after night, Master mating with any one or more of the many farm girls, then I licking her clean and licking Master clean. But only licking him clean: Master did not let me get the upper hand again. Throughout the night and invariably every morning, Master and the farm girl of the night did not bother getting up to go pee. That's what I was there for: to drink their night pee. And their morning pee. Tasting acrid and stale and reeking of whatever they had eaten, I was forced to drink their pee while they urinated directly into my mouth. One night things were different. The farm girl that came to Master was different. I knew it. I could sense it. And I could smell it. She was menstruating. I knew it. Master of course fucked her deep up her ass. It was dark and I could see everything. When he finished, he rolled her over and called me to lick her clean. I licked her ass and swallowed all of Master's cum coming out her ass. And then it happened. My mouth went to the farm girl's pussy. I tasted it! For the first time in my life! I tasted blood! It drove me wild! Like all my natural instincts coming to life! I tasted menstrual blood! It drove me wild! My body knew precisely what to do! My tongue reached deep inside her pussy. Months of "special diet" and training had changed me in so many ways! My tongue was much longer, much stronger, textured and much coarser! And how I lapped up the menstruating farm girl! She screamed and moaned and yelled and shook and begged and shrieked! I ate that menstruating farm girl and ate her and cleaned out her ass and pussy! Master sat on the bed, watching every moment, smiling. Again and again, she screamed and moaned and yelled and shook and begged and shrieked! Master let me continue until she was spent. Gently, he tugged me away from her. He patted me between my legs and for the first time said something nice, "You are going to be of great service to my friends, bitch-sow." I smiled happily back.