Small amount of blood after defecating

[Erie_herps]

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?

What temperature is your freezer, most are 0*F so they likely wouldn't survive. However if your freezer is a higher temperature it is a possibility.