Chemistry Class {Dog TF}

    The classroom was a bustle, as it was usually during lab days. Beakers and test tubes clinking, water running, all sorts of liquids being poured, burners aflame at every station. It was one of the more fun things in chemistry-more fun than taking notes, that is-but it didn't decrease Sarah's dislike for the subject. While her lab partner filled beakers and wrote things down, Sarah just handed him the things he asked for and idly tapped her water bottle with her pencil. She'd copy the worksheet from him later. 
    She yawned, gazed out the window, drank from her water bottle a few times, just waiting for the lab to be over. "So booooring..." she groaned, grabbing for her bottle to take another drink.
    "Wait, Sarah-" her lab partner started to interject as Sarah reached for a tall beaker about the size and shape of her bottle.
    She grasped it, and before she noticed what she was holding, took a sip of the warm, clear liquid. 
    Almost immediately, there was a hot, sloshing feeling in her stomach. Without asking, Sarah rushed out the door and down the hall to the girls' washroom. The room was empty, thankfully, but Sarah locked herself in the biggest stall instead. She doubled over, on her knees, on the cold tiled floor. The heat in her stomach spread, engulfing her entire body like an inner flame. Quickly, to try and relieve the heat, she removed her clothes. Her blue tee, her light denim shorts, socks, bra, panties, and sneakers, all thrown off of her body and into the corner of the stall. She panted, hunched over and naked. 
    With a rolling pulse, she felt the heat concentrate on her face, spreading throughout. A feeling like pressure on the sides of her head started as her ears moved to the top of her head, lengthening and become covered by gray fur. With the heat still on her face, right in front of her eyes, she saw her nose and mouth lengthen outward and widen. Her nose became a black snout, and her lips stretched back against her new muzzle and turned black. Along the tip of her muzzle, whiskers sprouted outward, long and translucent. 
    Sarah whimpered softly. The heat concentrated itself on her hands and feet. Her palms and soles morphed into black pads. Her fingernails lengthened and sharpened, pads appearing on the bottom of her fingertips. They shrank back, covering with gray and white fur and morphing into perfect little paws. Sarah found the strength to stand, but found that her new way of standing was on her four new paws. 
    More quickly than before, the warmth flowed along her back to her behind, where a furry gray tail sprouted, curving slightly and wagging like a metronome.
    Her chest flattened with the heat on her chest, teats popping up along her stomach, soft and erect.
    With a feeling like pricking needles, the heat pricked all along Sarah's body, her bare skin sprouting gray and white fur speckled with black. The short black hair on her head disappeared, replaced with new fur. Her ears perked up, looking in the reflection on the stall wall with surprise and watching her almond shaped eyes turn wider and blue. 
    She whimpered with nervousness, walking in circles a few times. Then, she stood still. The heat had pinpointed intensely in one spot: her crotch, which now felt wet and warm. All the feelings in her head changed at once, feeling wild and only wanting one thing.
    The bathroom door opened, followed by footsteps and the stall door opening. Standing over the husky was Sarah's lab partner, smiling down at her.
    "Looks like what I cooked up worked. And in heat, too. This is better than I thought!" He crouched down and snapped a little blue collar around Sarah's neck. "Let's get you home. We've been looking for a bitch to breed with Jake for a long time. I'm sure he'll be ecstatic to see you now, Sarah."