No, Vanessa has to resort to the formula

As the minutes turned into an hour, Vanessa's hunger began to outweigh her arousal. She wondered if she should just leave the booth and search for Melissa. She pushed her chair back and pulled her breasts back from the window, prompting the lights to die out on the outside. Vanessa tried the door handle. It was locked from the outside, of course. Vanessa looked at the formula dispenser at her station. As hungry as she was, the pellets that looked like the excrement of a cardboard animal, seemed oddly appetizing. Melissa did say the formula was very filling. The problem was, the last time Vanessa tried the formula, she vomited. Vanessa hesitated, unsure of what to do. Finally, she decided to give the formula another chance. She grabbed a couple of pellets, shoved them into her mouth, then drank directly from the tap, trying to gulp down the pellets without tasting them.

Vanessa swallowed the pellets, and as she did, she tried to ignore the bitter taste that lingered on her tongue. She looked around, hoping to see Melissa returning with some human food, but there was still no sign of her. Vanessa sighed, leaning back against the wall of the booth. As Vanessa waited, she closed her eyes and tried to distract herself from the gnawing hunger in her stomach. She thought about the stranger who had just left her booth. His touch had been so electrifying, sending shivers down her spine and into her crotch. Vanessa felt fine and not nauseous at all, so she decided to help herself into another fistful of formula pellets.

Vanessa began to feel a warm sensation building up within her. It started in her chest and quickly spread through her body, causing her nipples to harden. "That's weird", Vanessa thought. "Is the formula already doing something to me? Melissa said it would take at least three days." At any rate, Melissa's hunger had completely disappeared and she was feeling much better. She noticed the other cows starting to receive users and decided it was time for her to continue her own M.A.S.T.E.R. duty and positioned herself back into the window.