How do you heat you cage?

My best guess would be a burn or scrape from either a heat bulb or squeezing through a tight space!

As long as it remain like this it should not pose any issues.
Should it at all looks the slightest bit inflamed i would vet the animal.

Hope that helps!
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Greg Stephens
Arboreal Specialties
gstephens1@zoominternet.net