As he stood there fighting weird urges, Derrick felt a tug on his penis and yelped. The kid had decided one 'teat' was better than nothing, and tried to draw milk. Derrick pushed the kid's head away and managed a grin. "Not what you are looking for there." The stubborn animal nosed his hand away and tried again. After failing to discourage the creature, and realizing the suckling felt pretty good, Derrick let it be.
He was relived to see the cows and sheep start to wander off, and the hog flopped on its side. The female pig started squealing again, more agitated that it had been before. "You don't like goats?" Derrick was feeling oddly dazed, but managed a grin. "I think they are really nice." The suckling from the kid was resulting in squirts that were very satisfying, if not sexual. But then the little animal seemed to pull something else with the same sensations.
Confused, Derrick looked down and stared. It took a few moments for his brain to process what he was seeing. Soft-looking white fur covered his belly above a tough-looking pink mound that the kid was nursing from. An udder. A nanny goat's udder. The fur spread up his chest and down his legs, and he felt his bones shifting and changing shape. Part of him had the idea that all he needed to do was pull away, to stop the kid from nursing, and he would be normal again. But he was fascinated to see his body morph rapidly into that of a goat, and even more importantly, the nursing appealed to a primal instinct that was being fulfilled.
Derrick's center of balance changed and he fell forward onto arms that ended in cloven hooves. Another nose prodded his - her - rump, and a tongue licked a very sensitive and pleasant slit. As the kid finally finished nursing, Derrick bleated in pleasure and alarm as the billy goat scored an immediate hit with his erect penis and thrust in deep. Another primal instinct flared, and she pushed back, bleating as she was mounted, and bred. The male's seed jetted into her, and the magic that had changed her accelerated the process so that by the time the Billy had pulled out, Derrick was fully pregnant, and knew it.
The former boy's mind cleared quite a bit, but memory and intelligence did not change the knowledge that she was now an expectant mother. Derrick should have been upset, she thought, yet being a nanny goat felt right. So did the idea that she would eventually give birth to and nurse her own kid. But that would take way more than two weeks! Derrick tried to feel anger or fear or even concern that she might be stuck here as an animal for the rest of her life. But the more she struggled to rebel, the harder it was to understand why she should care. It didn't matter that she had been a human boy. She was a nanny goat now. Acceptance was total and Derrick wandered over to join the other goats grazing in the field.