A commission for  DragonTamer34 of them turning into a blueberry

De ate some kind of new berry while wondering in the wilderness. It seams to have had an interesting side effect, they started to turn blue. Then all of a sudden, if felt like they were filling with some kind of cold heavy liquid. De looks down to see their blue abdomen quickly expand. Their expanding belly felt soft, and they could feel light bubbling from the juice within them. It felt somewhat nice, but soon it got out of control. Everything quickly started to fill with juice. Their legs got super thick and swollen, their belly is nearly touching the ground, their arms and wings are so thick and full of juice that they are hard to even move. De's neck has now gotten super thick, and even their cheeks are filling up with the mysterious juices. The sounds of the bubbling juices are now louder than ever. They look at their swelling neck in shock, as their open jaw is pressing into their blue gerthy neck, bigger and softer than they ever imagined it to be. The swelling has shown no signs of stoping, and all De can do now is wait for it to stop, if it ever does.