As Jess munched, she felt the familiar rumbling in her stomach and looked down to see her pot belly expanding a couple more inches. "Come on," she griped. "They're only peanuts!" She looked at the can in her hand, then threw it back onto the floor. Mary's white-furred ears perked up and she sniffed her way over to the can, greedily licking up the spilled nuts.
Jess couldn't stand watching her friend eat without visibly gaining a pound. She trudged over to the vials, feeling her stomach and breasts sway as she went. She rubbed her large belly as she looked over the vials. At least she could drink something in this house without gaining weight. She was looking for the human vial, but before locating it another one caught her attention.
It had a picture of a lion on it. Jess liked cats, and the idea of becoming a lioness seemed much better than a pig. She picked that one up with her thick fingers and downed half the vial.
The changes came slowly, but surely. From her pink skin, yellow fur sprouted. It covered her arms and legs completely. Thin white fur grew on her stomach and breasts, but they didn't give any indication of slimming down. Her already-wide face furred up and her pig snout turned downward into a lion's muzzle. Her tusks shortened to fangs that fit inside her mouth and her upper lip drooped a little. Her pointy ears rounded out and grew yellow fur. Her piggish fingers and toes lost their dark hoof-like nails in favor of thin, sharp claws that could be retracted into her paws. The fat on her limbs changed to strong muscle. Jess purred in reaction to these changes, and she rubbed her padded hands across her large belly. She guessed the girth of being a pig-woman wasn't going to go away that easily. Likewise, she noticed she still had a curl in her tail, though the tail itself was bigger and yellow-furred.
Mary was finishing up the last scraps of Jess' mess. When she finished, she brushed her mouth clean and stood up. Jess saw a little bulge in Mary's belly, but it wasn't nearly enough to compete with her own. The goat-girl clomped on her hooves to the lioness, looking over her new body. "You look great!" she bleated. "Maybe I should try that vial out." Mary took a three-fingered hand and ran it down a lock of Jess' dark hair. "Though it didn't change your hair color. You could do with a wild mane."
"At least I'm not hungry anymore," Jess said in a deep rumbling voice. "What are you going to try next?"