She began to grow in size, skin bulging and bones popping as she reformed. And as her body grew she took in more of the shaft, the bull thrust again to go deeper. Another moo bellowed from her lips and Susan began to change even more, wishing with all her might to become more like an animal. This time an itching sensation broke out all over. As the bull trust, his course fur scraped over Susan's naked flesh, but soon she felt her own hairs rub against him; she was finally getting the fur she wanted, thick coarse wiry cowhair. Her face burned and squirmed as each thunderous rush of blood brought more changes. Eyes shifted more to the side as the ridge of her nose widened pushing them appart. Her ears growing just a little more and a slight ridge forming on her forehead as the horns grew a little more. Her neck lengthen and ticked as her muzzle grew even longer, now she wouldn't have to stoop to graze. Her chest barreled slightly as her shoulders and hips grew broader.
She was now even closer to being a complete cow, the prospects not frightening her at all. Her brilliant orange fur was finishing up as Susan's now much larger form pushed the last inch of the bullcock into her massive leathery pussy, her new strength even managing to lift up the bull, allowing for even better penetration. At this, it was too much for the bull, who bellowed along with Susan as he blew his seed deep into her womb. The feeling was incredible, and she came instantly. Slowly the bull removed himself. Leaking and overwhelmed, Susan clopped back over to the gate. She looked down and her now furred forelegs and saw somewhat to her relief that she still had hoof hands and not full hooves. She still a job to do, but now that she was more cow than human, perhaps she could join the herd properly tonight. Her form was also now much larger, almost the size size of a cows making her truly gigantic, she almost broke the gate with her new strength. Getting use to her new size was hard as she continued with her tasks, not bothered at all by the wet stickiness of bull semen still leaking from her. Eventually, she managed to get everything in order and let the other cows in.
She milked every one, taking good care of each. Some reacted oddly to the smell of the bull on her, and one even licked at the dipping cum from her pussy. Still sensitive and soar from her first time with a real animal, Susan's didn't encourage it. At long last every cow was milked and at back grazing, now it was Susan's turn. She didn't expect to have much milk, but if the bull had indeed made her pregnant, she expected to swell up any day now. Brimming with excitement, Susan clopped her way over to a milking stall. Without anybody to help her, she would have to turn and face the other way. Taking a steel tube in her hoof, Susan turned on the machine, then bracing herself she attached it to one of her teats. She mooed slightly at the feeling of being milked for the first time, attaching more until two cups were attached to her breast teats and two to her udders. The pulsing sucking felt great and the smell of fresh milk filled the air. Looking over from her milking stall, Susan saw her reflection in a wash basin mirror not far away. She did indeed look like a cow now, her long face was close to a cows, apart from her long mousy hair and her eyes that were still mostly facing forward. Her chest was slightly barreled, but her hips were still round and not square like a cows, allowing her to still stand upright. She gently caressed her body while what little milk she had was sucked into the central vat, not bothered by sitting on the wet muddy concrete. At last it was done, and with the important chores over, Susan was free to try out her improved body at grazing.
Trotting out the barn on all fours, she opened the gate and went to join the herd at long last. At first the cows were cautious but eventually relaxed around her, letting her graze contently next to them. Her long neck and face meant she didn't have to bend down anymore, and her tick dextrose lips acted almost like a hand as she neatly plucked tufts of grass. With a little practice she managed to gather enough grass in her mouth to chewed, eventually swallowing some. She had tried to graze the night before, but she had been too tired to make a decent go of it. Then as she continued, a new reflex brought up some of the undigested grass, forcing her to chew the cud. Inexperienced with cud chewing, Susan lost some of it out the corner of her mouth, drooling thick white and green liquid all over. Chewing and cleaning her face with her big tongue, she continued to revel the feeling of being an animal.