The strange feeling spread outward from her stomach, and soon her whole body felt ...off. Mary nervously looked up and down her body, trying to figure out what was going on, but nothing seemed different.
Afraid of changes she couldn't see, she rushed to her bathroom mirror, the remains of her clothes finally ripping apart from the extra strain of her movement. While she had to strain a bit to look at more than her face after losing a few inches to her sex change earlier, she still could get a good look. She was rather cute, with her small muzzle and her button nose, and her eyes even kept their original blue. However, since it was the first time she saw her new self in the mirror she couldn't tell if anything had changed from a glance. After a very thorough examination, unconsciously adjusting her posture slightly each time she looked at a new part of her face, she failed to find anything new and turned around to get a better look at her backside.
It too seemed to be exactly like when she last had seen it, and while she saw more of her back than before, nothing seemed out of the ordinary - short white fur everywhere, but it too stayed the same, neither growing rapidly, nor changing color, and so did her hair.
Sighing in defeat, she almost wanted to deny anything was happening and just ride out her changes - if there even were any - and just assess the damage afterwards, but she still felt uneasy about that weird feeling, so she bent forward to examine her face again, confident she could spot changes now that she'd gotten a better look at herself.
Her instincts seemed correct - something definitely was different about her reflection, but she couldn't quite put a finger on it. It must've been a very subtle change, but maybe she could catch it this time around. But as much as she stared into the mirror, she wasn't able to make out what was new about her.
Sighing in frustration, Mary went to examine her body again, when something brushed against her ears. Surprised, she looked if she'd maybe forgotten to close the window, but it was tightly shut - and a bit lower than she remembered. Puzzled, she wanted to check out what caused that effect, but something was still tickling her ears, and it was rather insistent about it. Looking up, she was surprised to find that the ceiling was much closer than she remembered it, and reflexively ducked. After carefully leaving the bathroom again, she peeked back inside to see if anything caused the roof to sag, but she couldn't find anything - in fact, the adjacent room seemed to feature a similarly low ceiling, and slightly smaller furniture than she was used to. She was about to investigate her changed surroundings, when the strange feeling that she'd felt ever since she ate that carrot finally subsided. Deciding to take a last look at herself, she went back into the bathroom, and promptly hit her head against the door frame.
The pain in her forehead finally drove home the extent of her changes - she had grown bigger! Incredulously staring at her reflection, she finally was able to make out what had bugged her about her face before - the fact that she could see most of her upper body reflected along with it, when she barely managed to get her neck into the frame the first time. Aside from her new size - she estimated she was a few inches shy of six feet, not counting her ears - nothing else seemed to have changed. Both relieved to finally know about her changes and unsettled about her unfamiliar, yet familiar surroundings, she went back into the living room, where she'd left the box of vials.
The television was still running, and while the previous show had ended, Mary could still smell a whiff carrot in the air, reminding her of what had happened earlier. Thinking about what to do next, she sat down in her armchair - a rather snug fit, after both her hips, and then her whole body had grown from the changes she'd experienced already.
She definitely wanted to mess around with the vials some more, but maybe she should spend some more time in her current form before moving on - after all, she was in no rush to get through the whole set.
Another thing on her mind were the carrots remaining in her fridge - while the side-effects needed some preparation, especially if she was going to be even bigger, they were extremely delicious, and since she knew what would happen to her this time, she could focus on enjoying them this time, dealing with the changes as it became necessary.