Lactation hormones.

Amanda had been in what was called the "Vet Clinic" for the past 4 hours. She'd been branded with a searing hot iron on her left ass cheek with a round circle with a "B" in the center and words that read "Grade B Breeding ****". As if being bred and used as human cattle wasn't enough humiliation but she barely rated above average.

The male Veterinarian had also tattooed a barcode to her lower back. It was apparently a way to track Slaves on the island and would keep her status constantly known. The most humiliating treatment was her tits had been modified with lactation enducing hormones as she could feel her small B cup tits swelling under the medication.

She had been restrained on all fours to what she knew was called a "Milking Frame". The fully metal device locked into her collar and wrist restraints keeping her on all fours and allowing her tits to hang under her. Milking cups had been applied to both breasts and they we steadily pulling on her now swelling areoles and nipples.

She looked down in horror to see the last couple hours on the machine had just started to bring results. Small droplets of milk seemed to squeeze from her small nipples and drain into the container. The Vet smiled at his accomplishment. "See even small udders can start to produce within hours." He said. "I bet the hormones and pregnancy will give you at least one cup size... maybe two" his hand seemed to squeeze her left breast firmly causing a firm jet to splash out and into the machines collection device.

"They tell me only to put fresh cows on for an hour but since you were caught trying to free one of my top milk producers I'm gonna suck your tits dry until it hurts." The cruel man turned the suction all the way up and left the crying Amanda to be tortured by the device.