A Weight Gain Escape

Some wolf weight gain to start out your week! C:

Still time to vote for the New Year's story! https://www.patreon.com/posts/45427347 In the event of a tie by Wednesday night, I will choose the winner.

__________

Felan, Sara, both wolves, and Sabrina, a Siberian Husky had been captured, and Felan was separated from the others.  Now, they had to escape.
The male wolf woke up alone, and looked around, trying to process exactly where he was.  He was in some sort of cage, located in a large, nearly empty room, with an open door on the other end—now, he just had to figure out how to get to it. . .
Felan pondered for a minute, trying to figure out how to get out of this cage.  Then he realized something: the cage didn’t have any sort of lock on it.  He reached out with one paw and poked at the door . . . and it actually opened, the door falling forward and showing him an exit.  Smiling, the wolf walked out of the cage, and looked around the room, trying to find anything that could help aid his escape.  But, as his first impressions had seen, it was completely and utterly empty, aside from him and the cage.  At least the door was open.  Hopefully, it wouldn’t be hard to escape this place. . .
He walked up to the door and pushed it further open, then walked out.  Looking around, he could see a series of hallways ahead of him, all lined with various open doors.  “Sara?  Sabrina?” he called out.  No answer.  Hmm, maybe he could start with one hallway, and then make his way back here?  It would be tedious, sure, but it was at least worth a try—
Then, he heard a howl of pain . . . a howl he recognized!  “Sara?!” he called out, now feeling worried.  Then, another pain filled howl, this one Sabrina’s!  They were coming from his left side, so that gave him a step in the right direction—Felan had to act fast!
He ran into the left hallway, calling out as he went.  “Sara?!  Sabrina?!” he cried again, running down the hall and listening carefully for any sign of them.  But he couldn’t find anything. . .
More howls of pain!  They were coming from the right this time, near the end of the hallway.  He ran down to the end of the hall, and heard a strange sound as he went: the sound of metal twisting.   What was going on to Sara and Sabrina?  He had to get them out of there!
He found the last door at the end of the hall, and pressed his ear against it.  “Sara?  Sabrina?” he called.
“Felan!” Sara’s voice called from the inside.  “Please, help us!”
Felan ran against the door, trying to get inside, but though the door was open, it was much heavier than his had been.  He pushed as hard as he could, slowly inching it enough for him to slip inside, and soon enough, he was able to enter.
He went inside the room—and saw a surprising sight.
Sara and Sabrina were also in cages, yes.  But they had grown a bit since he had last seen them, and were pressed against the inside of the cages, which were clearly straining to fit them.  “What’s going on?!” Felan asked, alarmed.
“I’m not sure!” replied Sabrina.  “When we woke up, we were just . . . like this!  Growing, I mean.”
“We don’t know why,” added Sara.  “We were just trying to figure it out when you showed up.
Felan nodded.  “Ok.  Just hang tight.  I’m going to try to get you out of there, and—”
But then, the true growth began.
Sara felt the process start to begin again, and she let out a scared howl as it did so.  Inside her, her bones stretched and thickened to create a new, larger form, increasing in size as she began to transform with them.  Then her tail swelled in size, growing big, the fur on it increasing in length and thickness to fit the new size of the tail.  Then her legs grew longer and bigger, enlarging quite a bit, and her paws swelled, the five toes on her forefeet and the four on her hindfeet increasing in size until they were quite a bit bigger.  Her chest rippled and swelled outward, and then, it was time for her face to change.  Sara’s snout grew longer, poking outside of the cage as it did so, and her nose increased in length and size.  Her neck stretched out and became thicker, her ears became larger, and her eyes widened, their circumference becoming larger than before.  Her teeth grew larger as her mouth began to grow, and her lips stretched to fit this new jaw.
All the while, the cage strained and strained, more and more.  Soon, it wouldn’t be able to take it. . .
But this time, the transformation felt just a little bit different.  Like before, her bones were expanding and stretching within her, and her skin grew outward with it, but unlike before, something else happened.  This time, weight gain also occurred with this transformation: her stomach bulged out underneath her and increased in size, becoming plumper and rounder, just a bit.  And that bit would grow significantly as the growth would continue. . .
Sara’s cage started to strain even more, clearly struggling to fit the growing wolf; she whined in discomfort as she increased in size.  And with the change in her stomach, it was just too much.  Finally, her cage snapped, ripping apart above her, the top half flying off and landing on the floor with a loud /clatter/.  Sara let out a surprised yelp as it did so—she hadn’t been expecting that.
But the transformation wasn’t done, not in the least.  And so, the growth continued.
Sara felt her body starting to swell, and looked down to see her stomach was growing more, tingling as it went!  She cried out in surprise and started to run, but then her belly grew so big, that it lifted her legs off of the ground!  And so she was immobilized, unable to keep moving, and forced to watch herself continue to get bigger and bigger.
Her head expanded in size, swelling outward, her muzzle growing as her teeth, nose, eyes, and ears all grew massively.  Her chest also enlarged, and the weight gain spread to that area too, causing her to get even bigger than she already had been as fat lined her body.  Her legs extended outward and thickened, rendering her able to stand again, but unable to move because of the weight, hopefully for just the moment.  Her tail was the last part of her to grow, and it doubled in size, becoming longer and thicker to fit with her larger form.
Then Sara started to grow massively.  Her body swelled to enormous heights, so that she was going toward the ceiling of the room they were all sitting in, and the weight gain spread throughout her form.  It had just been her stomach and chest, but now, it began to effect more of her.  Her legs, which had been thin and sturdy, began to increase in weight, becoming covered with fat on all sides, and even her paws gained weight and became part of her new, large, chubby form.  Her form rippled and pulsed as it grew, continuing to double in size every few seconds, and weight spread throughout her body.  Her face became flabby and puffed up on the ground, fattened by the overall effect of the transformation.
Meanwhile, Sabrina hadn’t been doing much better.  Unlike Sara, her transformation started at her head, swelling it up like a balloon as she began to grow.  Her snout puffed up and stretched out, her teeth and jaw thickening more and more as she became bigger and bigger. Her eyes dilated and widened to fit with her new head, increasing in size along with her nose, which grew at the same time as her snout.  Her ears were next, bulging out on the side of her head to match her greater height.  Finally, her neck grew longer and larger, the bones inside expanding and thickening to support the growing head.
The rest of her bones did the same, becoming thicker and bigger as other parts of her body began to grow.  Her chest increased in size, growing and changing her, making the cage strain more, and her stomach swelled too.  Like with Sara, weight gain occurred, and her stomach became rounder and plumper as she grew—that’s when the cage snapped, the top falling onto the ground as the Siberian Husky grew too big to fit inside the enclosure.
And her body continued to grow.  Sabrina whined in discomfort as the bones in her legs expanded as the legs themselves increased in size, becoming longer and thicker to suit her new, larger body.  Her paws swelled, as did her toes, and soon the growth had stopped—for now, at least.  Her tail twitched, then grew longer and bigger, the fur prickling as it became larger.
There was a brief pause.  But this was just the beginning. . .
Sabrina’s stomach grumbled and groaned underneath her.  And then, like with Sara, it swelled up massively, growing larger and larger and making the Siberian Husky cry out in alarm!  She reached down to her stomach, pushing at it and trying to make the growing stop, but there was nothing she could do to stop what was about to come.
Her stomach inflated, first by a centimeter, then by an inch, then by a few inches, until Sabrina was lifted right off the ground by her growing stomach as it increased underneath her.  The Siberian Husky let out a startled howl, but that howl turned to relief as her body doubled in size.  Mainly because t made her legs grow enough so that they were touching the ground again, so she could stand—but she quickly discovered that thanks to the weight, she couldn’t move, and her relief turned to anxiety once again.  Then the weight gain spread to the rest of her body: it went from her stomach to her chest, adding chub to that area, then from her chest to her legs and paws, making them bigger and fatter.  The fatness spread up her neck, making it grow even thicker than it already had been, and reached her face, making her snout and cheeks puff up.
Then, like Sara had, Sabrina’s growth increased to astounding levels.  Her body swelled up more and more, becoming larger and fatter so that the Siberian Husky was also heading toward the ceiling.  Her new, chubbier, bigger form pulsed as it grew, rippling outward as it doubled in size every few seconds and weight gain spread to all of her body.  Her form became puffy and fat as it grew from the ground.
All the while, Felan watched in astonishment as the wolves he knew went from somewhat larger, to a bit bigger, to massively huge.  The weight gain was the most startling aspect of all, something he hadn’t expected, and it transformed Sara and Sabrina considerably.  Their bodies sunk into the floor as they grew, making dents as they increased in size.  The male wolf paced around the room, trying to figure out a solution.  Could he stop this?
But then, he realized something.  At this rate, Sara and Sabrina were going to grow big enough to crash through the ceiling—and then, they would be able to escape this facility!  Yes, this growth was startling, but it could help them get out of here.  And then, once they were out, they could figure out a solution.
And that was when the female wolf and the Siberian Husky grew big enough to break through the room.  Their heads hit the ceiling, straining it, and then pushed past it.
Felan expected the sunlight to come pouring in, for them to be able to escape outside.  But instead, an even higher ceiling revealed itself, showing that even though they had broken through this room, they were still trapped inside another.
And there were many others. . .