Gaaaah, I'm dying from the adorables. It took forever to get a decent picture of them because all of our lamps keep dying, so it was impossible to get good lighting. If you want these two, they're available for commission!
Two, in fact. We didn't know that it was a combination of two, which made it really hard to pinpoint just what the heck was going wrong. The tubing in the nozzle that spits out the plastic had degraded (from being used so much. No one expected it because we use our printer much more than most people.) This caused it to constrict the flow of plastic in certain areas. And then the bolt with grooves cut into it that rotates to feed the plastic strands into the machine was not the best quality, so it sometimes did not have the best grip to force the plastic down. Replacing the bolt and the tube should fix everything.