The Precision Mixing options seemed to create so many opportunities that demanded exploration. Mary slid the box along small kitchen table so it sat on the edge and leaned over. She opened the Miscellaneous drawer and removed both the reality vials as well as the gender vial. She wanted to test targeting certain elements with the Gender vial. Could it increase just one aspect of her "femininity"? And with the reality vials, could she make it so only some changes were real to others? Or was it all or nothing?
She had an idea to test all of these, and she went into the animal drawer for the tiger vial as well. Then she had a thought. Human bodies weren't arranged exactly the same way as animal ones. She wanted to test if it would simply add a part to her, or if it would replace whatever similar parts she had. So she took out the cow vial as well.
Carefully focusing she opened the Precision mixing drawer. She slotted in the Gender vial, focusing on the hips. Then the tiger vial went into another slot while thinking about hair color and pattern. The cow vial went in, thinking "udder". Lastly the reality vial went in, thinking "everything but hair color". Would it even work in the negative? She pushed the thought aside as she slide the drawer closed and while it processed she quickly drank the full resist reality vial.
When the mixing drawer reopened it had a liquid inside of faint orange with an opalescent tinge. Mary suppressed her urge to shudder as she uncorked the vial and drank the thick sweet liquid. She shuddered as she felt the changes. It was strange to feel reality changing. She could see the wall of her kitchen bulging outward as a built in milking machine grew from the wall. Her shirt lifted away from her belly as her hips grew wider. Her jeans became low-riders and her lap grew fuller and fuller with bulging sloshing flesh as an udder grew from her belly even as her chest became as flat as a board.
Standing was less awkward than she expected, naturally adjusting due to the reality adjustment even if Mary was aware of it. Her hips, formerly rather boyish, were now a handbreadth or even two wider. Her heavy Udder, tipped with a quartet of nipples, draped over her thick thighs. A quick use of her phone's front-facing camera showed that her hair had indeed changed from a curly blonde bob to a curly bob of striped orange and black.
So far, she had learned that she could target body parts with the gender vial easily, and that body parts seemed to replace their equivalent on a human, rather than supplementing them. She wondered if there was a way around that for a moment but shook her head. She still had to find someone to test her hair on. She decided to put her phone to use as well, giving her mom a quick call via the built in video calling app.
"Mary?" Her mother's voice came, "When did you change your hair!?"
A success there. Mary made small talk, explaining she'd dyed her hair for fun since she was stuck at home so much lately. As she did she let the phone pan down over her body and her new udder but this elicited no response from Mary's mother. Clearly negative conditions "everything but ..." worked just fine!
Mary let the call end quickly and grinned to herself. Her new udder was more of a nuisance than an appealing addition to her, but there was a lot more she still wanted to try. So she decided...