I'm still in the middle of correspondence with my vet. They do think this is abnormal, but we haven't come to any conclusions yet. In the meantime I'm trying to think of how she contracted pinworms in the first place. I'd like to think I've been pretty on top of hygiene for her because although I don't keep in the most sterile set up, I spot clean daily, change her water almost daily, scrub out the water bowl around every two weeks, change the substrate and disinfect everything with clorhexidine roughly every 2-3 months, and anything from outside that I've put in her tank has been scrubbed and baked. The only other thing I can think of is through her feeders, which I originally didn't consider since they're all frozen, but apparently pinworm eggs have been known to survive at 18*F, so I'm not going to rule that out completely. Any thoughts?