"Well, if you're letting me choose to be an animal, then I choose to be a cow," proclaimed Damon.
"I think you mean bull, young man," giggled Circe.
"No, I mean cow. My step-dad thinks I'm lazy anyway. But at least cows make milk while they're lounging around all day in the fields. I can tell you for sure that it's more than what he gets done at that so-called job of his."
"Yes, but ... cows are female. The males are the bulls. Surely someone's taught you that, haven't they?"
"Well, yeah. I've always wanted to be a girl, since I was a very young boy. That's what I was fighting with my step-dad about. It's why I'm here. Every time I put on lipstick or sneak a skirt into my bedroom to try on at night, he flips out. If you wanted to change me, I'd want you to change more than my species."
"My, my, you are an interesting one!" said Circe with a glint in her eyes. "Very well, I've changed males into females before, but I've never heard anyone volunteer for it. Here, drink this enchanted milk, and you'll be a cow soon enough."
Damon was surprised to see Circe offering him the fateful beverage. It looked like any other glass of cold milk, but Damon didn't know where the glass had come from, much the frosty white fluid inside it. He hadn't seen her with any food or drinks around her until just now.
He took the glass and sipped. It tasted good--really good, like he couldn't stop drinking it until it was gone. He tilted the glass back and practically poured the entire contents down his throat. He wiped the residue off his lips against his sleeve. Then he felt a tingling in his belly. Damon could feel and hear that things were squishing, splitting, and shifting down inside him. Then he felt a pressure on his lungs.
MOOOOOOOOO!!!
Damon let out a long, loud bellow that sounded exactly like it might come from a farm animal. Then Damon realized he was feeling very bloated on his tummy. It felt like something was bulging out down there, pressing uncomfortably against the inside of his pants and shirt. Four points especially were more sensitive than the rest of it, and they were digging painfully into the tight fabric, so he loosened his belt and tried to free the basketball-sized growth he could see materializing down there. It had four thick teats, and a pulsing network of veins so he could pump his blood through it.
"Wow," he said, gently massaging his new udder, impressed at gaining his first animal part--his first FEMALE animal part. He grabbed one of the teats, but nothing seemed to come out. He must not be making any milk yet. Then he felt a pressure in his back.
Damon's eyes widen when he felt his spine stick out from him and start to wave around. He looked back and saw he had a tail now, swiveling under its own power as it inched into existence. It was barely as long as his fingers at first, but it was getting longer, thicker, and heavier. By the time it was as long as his forearm, it was hanging limply under its own weight, but Damon was learning how to make it twitch. When it was dangling lower than his udder, it had stopped growing, and coarse hairs were sprouting from the end of it. He could slap it up against himself with the slightest mental effort. He was still staring at it when he felt his ears twitch, and then he felt them wobble. He reached up and discovered that his ears were longer and broader, stretching out beside him and growing puffy fur. He flexed them back and forth a bit, getting the hang of how it felt to move them. He found that sounds were easier to hear when he aimed his ears at them, like the crackle of the torches or the rustling of Circe's robes.
"This is cooOOOOOOOOool!" he moaned accidentally while swiveling his ears, swishing his tail once or twice as he did so. Circe giggled. She was already looking forward to her willing new cow.