Mackenna pulled a cracker out of the bag and nearly wolfed down the entire thing, save for the head. She nodded as she chewed the cracker, admittedly enjoying its taste. She swallowed the cracker and licked her lips, catching any crumbs she may have left behind. Mackenna brushed her long auburn hair out of her blue eyes, then reached out for the rest of the cracker to finish it off. She then felt a pleasurable tingle through her body and heard something drop into the bag.
Mackenna reached out to grab the bag to inspect whatever had dropped in there and noticed her hand was misshapen. Her fingers felt stiff and looked much thicker than she remembered. She shifted her attention to an odd sensation in her backside, almost as if it was growing. Looking behind herself, Mackenna caught sight of her already sizeable backside getting larger. She watched as the cloth spread and grew tighter as she grew more bottom heavy. As her posterior expanded, Mackenna began to panic. She was worried that she was having some weird allergic reaction to whatever was in these crackers. She went to grab her phone to call somebody, then noticed her hands had completely changed into paws!
Mackenna's pants then suddenly ripped, her enormous butt tearing the fabric into pieces. While her thighs and calves grew, she felt her tailbone lengthen and turned around to see a little tail, which caught her off guard. Her belly, which already had a small layer of fat to it, began to gurgle and swell. She looked down and could no longer see her feet, which she felt shifting into paws, past her doughy mid-rift. Her entire body became more meaty and expansive, taking on a more ursine-like appearance and destroying her t-shirt. Her already chubby cheeks filled out and became rosier, while her chin sagged a little more as a result of her sudden weight gain.
Mackenna closed her eyes tightly, waiting for her metamorphosis to be over. However, things were not over for her just yet. She felt her immense breasts contracting, leaving nothing on her swollen chest. She then felt extremely hot, even though it was a brisk day and the heater was not turned on. Mackenna gingerly opened one eye and saw brown fur quickly spreading across her pudgy frame, stopping at her neck for some reason. Her new fur was not the cause of this heat that Mackenna was feeling though, as she felt her womanhood grow and shift in unimaginable ways. In a matter of seconds, Mackenna's vagina had changed into that of a bear. She felt some extra weight by her hind legs, feeling two tennis ball sized teats form. With that, her transformation from a chubby and cute woman to a plump bear with a human head was complete.
Mackenna opened her eyes and inspected the remains of the cracker she had consumed, seeing only a bear's head. Her eyes widened as she realised the cracker had caused this. They really were magical crackers!