He's puffy around his neck as if he's pumped air under his skin which makes his feathers stick out. The other symptom is twisting his head which seems as if he's trying to dislodge something from his crop. He's had these symptoms since I got him. Some days are good, some bad. There's been days that I thought he'd die for his stressful breathing with his little tongue sticking out sometimes.
I'll try to attach a video here of him with his puffy neck and twisting as if trying to get rid of something:

When I first got him about 3 months ago, I put him through a course of Ivermectin. Yesterday I put a drop of Scatt between his wings.
Along with the other Zebras, I've had him on Zupreem Fruit Blend pellets & a fortified seed blend for Finches. I also blend a combo of fine (bird) charcoal with homemade baked & ground eggshells & bird grit from the store. A cuttle bone is always available & of course fresh water daily. Every morning I scrub the plastic water bowl then spray itl with apple cider vinegar to lightly disinfect it then shake it out & add the water from the cold faucet.
Yesterday I moved him to his own cage & gave him only the bird seed mix, fresh water & a finger feeder with only the charcoal/eggshell. I also put a 40w Reveal bulb at the side of his cage for some warmth & UV. So far he's not showing any improvement but no different than he's been for so many other episodes in the last few months.
I noticed 2 other posts with some of the same symptoms. I'll keep y'all informed how he's doing with what I'm trying to do for him. If you have info for me to try please don't hesitate to offer it.