Every morning I wake up to see black marks on the bottom of my bearded dragon. I have a baby bearded dragon in a 20 gallon tank with a 75w basking bulb and a 10.0 for uvb. I use a temp gun and the rock directly under the bulb heats up to 105-110. Does anyone know what could be wrong?
Nothing is wrong, it's just natural patterning. Stress marks are basically just a myth, they aren't caused by stress. Instead they're caused because it helps them warm up faster, darker colors absorb heat faster basically, this is the best I can really explain it.